Unit Book 11 Electricity and Magnitism - WikispacesBook+11+Electricity...• demonstrate that moving electric charges produce magnetic forces and ... WORKSHEET 2 ELECTRICITY AND

1

Texas Teks• examine electrical force as a universal force between and two charged objects and compare the relative strength of the

electrical force.

• evaluate the transfer of electrical energy in series and parallel circuits and conductive materials.

• demonstrate that moving electric charges produce magnetic forces and moving magnets produce electric forces.

UNIT 11

ELECTRICITY AND MAGNETISM

PAGE 23 PAGE 24 PAGE 25 PAGE 26 PAGE 27 PAGE 28

PAGE 29 PAGE 30 PAGE 31 PAGE 32 PAGE 33 TEST REVIEW

NAME: __________________________________________ PER: ____

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SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY

APRIL 29 30ELECTRICITY AND MAGNETISM NOTES

MAY 1RAGING PLANET MOVIE WITH WORKSHEET

2ELECTRICITY AND MAGNETISM NOTES



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6 7ELECTRICITY AND MAGNETISM NOTES

8ELEC./MAG. LABSORPRACTICE DAY




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13 14ELECTRICITY AND MAGNETISM TEST REVIEW

15ELECTRICITY AND MAGNETISM TEST REVIEW

16ELECTRICITY AND MAGNETISM TEST

17MANDATORY TEST CORRECTIONS

18MAKE UP DAY OREXTRA CREDIT

19

20 21DEAD DAYNO NEW MATERIAL REVIEW FOR FINALS

22DEAD DAYNO NEW MATERIAL REVIEW FOR FINALS

23DEAD DAYNO NEW MATERIAL REVIEW FOR FINALS

24FULL DAY

6TH PERIOD FINAL EXAM 12:25-2:35

25FULL DAY

7TH PERIOD FINAL EXAM12:25-2:35

26

27 28NO SCHOOLMEMORIAL DAY

29FULL DAY

2ND PERIOD FINAL EXAM12:25-2:35

30FULL DAY

3RD PERIOD FINAL EXAM8:24-10:14

1ST PERIOD FINAL EXAM12:25-2:35

31 LAST DAY!HALF DAY



JUNE 1 2

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CLASSROOM RULES AND EXPECTATIONS

1. Be inside the classroom before the bell rings or you will be marked tardy-No exceptions. You get two passes every three weeks, use them wisely.

2. Quietly work on the warm-up activity that is on the board while class is starting.

3. Appropriate social and classroom behavior is expected at all times in this learning environment.

4. Do not talk while the teacher is teaching/talking or when you are doing your classwork.

5. You are to remain in your seat unless you have been given permission to get up or have been released from class.

6. The teacher will release you from class, not the bell.

LAB RULES AND EXPECTATIONS

1. Follow all pre-lab instructions and teacher directions2. There is no horseplay in the lab3. You are only allowed to conduct tests approved by your teacher.4. Appropriate social and classroom behavior is expected at all times in

this learning environment.5. All safety rules in the Katy ISD safety contract must be followed at all

times.

CONSEQUENCES

First Offense:You will receive a warning from instructor to adhere to classroom rules. Second Offense: A call home to parents informing of misbehavior.Third Offense: A referral to the office for further disciplinary action

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5

6

DEFINITION

DEFINITION

DEFINITION

PICTURE/FORMULA

PICTURE/FORMULA

PICTURE/FORMULA

EXAMPLE

EXAMPLE

EXAMPLE

SENTENCE

SENTENCE

SENTENCE

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I.___________________________

II. __________________________

– all things have electric charges.

A. Neutral charges – the number of protons and electrons are

equal • Protons – posi/ve• Electrons – nega/ve

B. Building a Charge – material such as carpet or hair loses

electrons easily and transfers electrons. • Sta/c electricity is the accumula/on of excess electric

charges on an object.• Van de Graaff generator – a device for producing high-‐

voltage staAc electricity

C. ConservaAon of Charge

Law of Conserva/on – applies to charges in the fact that charges

cannot be created or destroyed, but only transferred.

• Opposites a8ract – opposite charges a8ract and like

charges repel. • Electric Fields – an electric field surrounds every charge.

A. Conductors allow electrons to move easily.• Metals are excellent conductors.• Semiconductor – material such as silicon and germanium

that are neither a good conductor nor insulator. Only can

be used as a conductor if impuriAes are added.

B. Insulator – material that does NOT allow electrons to move

through easily.

UNIT NOTES UNIT NOTESElectricity Notes

9

III.__________________________

SUMMARY - 3 MINUTE PAUSE• Summarize key points so far• Add your own thoughts• Write a clarifying question

A. Lightning is a staAc discharge. StaAc discharge is the transfer of

electric charges through the air between two objects because of

a buildup of charges.

B. Thunder – caused by the heat energy of lightning.

C. What Gives Lightning it's Zap?• Lightning happens when the nega/ve charges (electrons)

in the bo8om of the cloud are a8racted to the posi/ve

charges (protons) in the ground.

• The accumula/on of electric charges has to be great

enough to overcome the insula/ng properAes of air.

When this happens, a stream of negaAve charges pours

down towards a high point where posiAve charges have

clustered due to the pull of the thunderhead.

• The connec/on is made and the protons rush up to meet

the electrons. It is at that point that we see lightning and

hear thunder. A bolt of lightning heats the air along its

path causing it to expand rapidly. Thunder is the sound

caused by rapidly expanding air.

D. Grounding – connec%ng an object to Earth with a conductor.• The earth is a large neutral object such that if a conductor is

connected to the Earth, it will ground out or become neutral.• Lightning rods are used in homes to ground out.


10

IV._________________________

V.__________________________

A. A voltage difference is the push that causes charges to move and

is measured in volts (V).

B. Charges flow from high voltage areas to low voltage areas.

A. Closed Circuits – a closed, conduc/ng path.• The flow of charges through a wire is the electric current. • The electric current is measured in amps.• Current is almost always the flow of electrons.

B. Electric Circuits• To use electrical energy, a complete circuit must be

made.• Circuits typically include a voltage source, a conductor

such as wire, and one or more devices that use the

electrical energy to do work.

C. Series Circuits• In a series circuit, the current only has one loop to flow

through. • Series circuits are used in flashlights and holiday lights.

D. Parallel Circuits• Parallel circuits contain two or more branches for current

to move through.• Most houses are wired with parallel circuits.

E. Household Circuits• Most household wall sockets are 120 V while the dryer

and stove requires a 220 or 240 V.• All household circuits contain either a fuse or a circuit

breaker.


11

VI._________________________

VII._________________________


A. Fuses• An electrical fuse contains a small piece of metal that

melts if the current becomes too high.• Too many appliances in use at the same Ame is the most

likely cause for the overhea/ng of the circuit.

B. Circuit breaker – a circuit breaker is a guard against overhea/ng.• A circuit breaker contains a piece of metal that bends

when it gets too hot.• The bending causes a switch to flip and open the circuit.

– a ba\ery is a device used to maintain a voltage difference.

A. Dry-‐Cell Ba\eries• A dry cell ba\ery is the typical individual ba\eries used.

Ex (AA,D)• There is a posi/ve and nega/ve terminal on each ba\ery,

causing a voltage difference. The voltage difference causes a circuit to flow.

B. Wet Cell Ba\eries• A wet cell ba\ery contains two connected plates made of

different metals in a conducAng solu/on. • An example of a wet celled ba\ery is a ba\ery used in a

car.As a car is driven, the alternator recharges the ba\ery by sending current through the ba\ery in the opposite direcAon to reverse the chemical reac/on.


12

VIII.________________________

IX.__________________________

X.__________________________

XI.__________________________

– the tendency for a material to oppose the flow of electrons, changing

electrical energy into thermal energy and light.• Resistance is measured in Ohms (Ω).• Thinner wires have a greater resistance to electron flow,

as opposed to thicker less resistant wires.• Longer wires have more resistance than shorter wires.

• Current (I) is measured in Amperes (amps).• Voltage (V) difference is measured in Volts.• Resistance (R) is measured in Ohms.

– the rate at which electrical energy is converted to another form of energy.

• Power is measured in Wa8s.• Current is measured in amps.• Voltage is measured in volts.

I. Electrical Energy – the amount of electrical energy you use depends on two things:

1. Power required2. How long it is used

CalculaAng Electrical Energy• Energy is measured in kilowa8-‐hours (kWh).• Power is measured in kilowa8s (kW).• Time is measured in hours (h).


Current = Voltage Difference / Resistance

Power = Current X Voltage

Energy = Power X Time

13



14

I.__________________________ – refers to the proper/es and interac/ons of magnets

A. MagneAc force is the interac/on between two magnets.

• A magnet is surrounded by a magne/c field that exerts the magneAc force.

• The magneAc field is strongest closer to the magnet.

B. MagneAc Field of a Bar Magnet

• Un-‐magneAzed iron brought near a magnet becomes magne/zed.

• Iron filings line up around the bar magnet. This shows the shape of the magneAc field.

C. MagneAc Poles – regions where magneAc force is the strongest

• All magnets have a north and south pole.

• MagneAc field lines always connect the north pole and the south pole of a magnet.

D. Earth’s MagneAc Poles

• Earth is like a bar magnet, with its south magneAc pole near its geographic south pole.

• ScienAsts are NOT sure what produces Earth’s magneAc field.

E. Compass Needles

• A compass contains a small bar magnet for a needle.

• If you place a bar magnet near a compass, north and south poles will a8ract.

F. MagneAc Materials

• Only a few metals such as iron, cobalt, and nickel are a8racted to magnets or can be made into a permanent magnet.

• These parAcular metals are magneAc because the magneAc proper/es of the electrons don’t cancel out.

UNIT NOTES UNIT NOTESMagnetism Notes

15

UNIT NOTES UNIT NOTES


Magnetism Notes

II.__________________________ A. Making a Metal a Magnet

•In order for a metal to become a magnet, the atoms in the metal must align their magneAc domains in the same direcAon.

•If you place a permanent magnet near a nail, the magnet aligns the magneAc domains and the nail becomes a temporary magnet.

•A permanent magnet can be made by placing the metal in a strong magneAc field.

•Permanent magnets can lose their magneAc behavior if heated or dropped.

B. What happens when a magnet is broken?

•In un-‐magne/zed iron, the domains are randomly oriented.

•In slightly magneAzed iron, there is incomplete alignment of

domains.

•In strongly magneAzed iron, virtually all of the domains are

aligned.

•Even if the magnet were divided into bits as small as a single

domain, it would s/ll have north and south poles.

C. North Poles Cannot Be Separated from South

•Each piece of broken magnet sAll has a north and south pole.

•No ma\er how many Ames a bar magnet is cut in half, there is

always a north and south pole, even in the smallest piece.

16

UNIT NOTES UNIT NOTESMagnetism Notes

III.____________________________A. Moving charges and MagneAc Fields

• When electric current flows through a wire, a magneAc

field forms around the wire.

• The direc/on of the magneAc field depends on the

direc/on of the current in the wire.

B. Electromagnet – temporary magnet made by placing a piece of

iron inside a current

• The more coils there are, the more current the

electromagnet has.

• The gauges in a car use galvanometers, which are devices

that use an electromagnet to measure electric current.

C. Electric Motors – a device that changes electrical energy into

mechanical energy.

• A ba8ery causes an electric current to flow through the

coil of the electromagnet.

• Unlike poles of the two magnets a8ract to each other

and the like poles repel. This causes the coil to rotate

unAl the opposite poles are next to each other.

• If the current in the coil is switched, the direc/on of the

coils magneAc field also switches. The north and south

poles of the magnet trade places.

• The coil is repelled by and a8racted once again to the

poles of the permanent magnet.

17

III. ___________________________ ConAnued

A. Generators

• A generator produces electric current by rotaHng a coil of wire in a magneHc field.

• Mechanical energy is turned in to electrical energy

B. Current DirecHon

• A direct current (DC) flows through only one direcHon through a wire

• An alterna%ng current (AC) reverses the flow of the current flow

C. Transformers

• A transformer is a device that increases or decreases voltage of an alterna%ng current.

• Made of two coils of wire called primary and secondary coils.

• If the secondary coil has more wires, then the transformer, increases, or steps up the voltage.

• If the primary coil has more wires, then the transformer steps down, or reduces voltage.

*** This is how electricity gets to houses in power lines.

D. Power Transmission and Transformers

• In the U.S., power lines can carry up to 750,000 volts.

• This amount of power is dangerous and cannot be used with household appliances.

• Step down transformers convert voltage to 120 V—a usable amount of power for household appliances.

UNIT NOTES UNIT NOTES


Magnetism Notes

18

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CLASS PRACTICE

For Quick Review of Attractive Forces

19CLASS PRACTICE

Raging Planet: Lighting

1. How is lightning created in clouds?

2. What is intra-‐cloud lightning?

What percentage of lighAng is of this type?

3. What happened to the telephone worker in Florida?

Why does he trim his one eyebrow?

4. How many volts are in an average lightning bolt?

5. If you could describe a lightning cloud by its composiAon and separaAon of charge, what does it most resemble?

20CLASS PRACTICE

Schematics of CircuitsRead each of the following ques3ons carefully. You must use schema3c drawings for each of the figures below.

1. What is required to make a simple circuit?

__________________________________________________________________

2. Draw a simple series circuit with a light bulb, a baZery, and wire.

3. Draw a series circuit with two light bulbs and a baZery.

4. If one light bulb is disconnected in the series circuit above, is the circuit open or closed?

5. If one light bulb is disconnected in the series circuit above, is the circuit open or closed?

6. Draw a parallel circuit with two light bulbs and a baZery.

7. If one light bulb is disconnected in the parallel circuit above, will the remaining light bulb luminesce? Explain.

__________________________________________________________________________________________

__________________________________________________________________________________________

8. Which circuit, series or parallel, is used in a typical household? Why is this beneficial?

__________________________________________________________________________________________

__________________________________________________________________________________________

Give a real life example of a series circuit. _________________________________________________

21CLASS PRACTICE

ELECTRICITY QUESTIONSFor each quesHon (1-‐9), indicate whether the picture or descripHon is idenHfying a series or parallel circuit.

1. ____________________

2. If you turn off one light, the others turn off. ________________________

3. Independent current paths? ________________________

4. Dependent current paths (they rely on each other)? ________________________

5. How your house is wired? ___________________________

6. _____________________

7. More than one path for electricity to flow. _________________________

8. Only one path for electricity to flow.________________________

9. One light can be turned off without turning the others off. ________________________

ELECTRICAL SYMBOLS -‐ Match the following symbols to their components in a circuit.

1. _____ Resistor A

2. _____ Variable ResistorB

3. _____ Switch C

4. _____ Light BulbD

5. _____ BaZery E

6. _____ WireF

!

!

!

!

!

!

22CLASS PRACTICE

ELECTRICITY VARIABLES AND UNITS

10. IdenHfy the correct unit for each variable given.

Variable Unit

Power WaZ

Current

Resistance

Voltage

11. What do the numbers with units in the leh column stand for?

Example: 10 I 10 Amps Current

12 V

3 Ohm

4 A

5 Ohm

120 V

EXTENSION QUESTIONS

1. Draw and Label a series and a parallel circuit in the space below.

2. A resistance of 30 ohms is placed across a 90 volt baZery. How much current flows in the circuit?

3. A current of 0.5 amps follows through a lamp when it is connected to a 120 volt source. What is the resistance of the lamp?

4. A motor with an operaHng resistance of 20 ohms is connected to a voltage source. Four amps of current flow in the circuit. What is the voltage of the source?

TIME TO CHECK YOUR ANSWERS!!! Go the following links to check and correct your answers to this worksheet.

SERIES OR PARALLEL CIRCUITS:h#p://www.cstephenmurray.com/onlinequizes/physics/electricity/seriesorparallel.htm

ELECTRICAL SYMBOLS: h#p://www.cstephenmurray.com/onlinequizes/physics/electricity/symbols.htm

ELECTRICAL VARIABLES AND UNITS:h#p://www.cstephenmurray.com/onlinequizes/physics/electricity/electricityvariablesandunits.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/seriesorparallel.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/seriesorparallel.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/symbols.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/symbols.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/electricityvariablesandunits.htm

http://www.cstephenmurray.com/onlinequizes/physics/electricity/electricityvariablesandunits.htm

23CLASS PRACTICE

Electric Math WorksheetSHOW YOUR WORK!!!

I = V / R P = V x I E = P x t

1) There is a 22 ohm resistance in the hea?ng element of a coffee maker and 5 amps of current passing through it. How much voltage does the coffee maker need?

2) What is the current used by a lamp if 120 volts runs through it with a resistance of 18.5 ohms?

3) An electric stove needs 120 volts, 12 amps, and 10 ohms of resistance.a. How much power does it use?

b. Convert the wa#age for the above stove into kilowa#s.

c. How much energy is used by the stove during 5 hours of use?

d. ANer determining the kilowa#-‐hours of Energy in part C, determine the cost to use this stove if your power company charges $.20 per kilowa# hour.

4) A 4 horsepower electric motor uses a current of 16 amps in a 230 volt circuit.a. How much electric power can the motor ideally deliver?

b. Convert to kilowa#s.

c. How much energy will be used by the motor aNer 20 hours?

d. At 9 cents per kilowa#-‐hour, how much does this motor cost to run for the 20 hours?

24CLASS PRACTICE

ELECTRICAL ENERGY, POWER and COSTElectrical Power: A measure of the rate at which electricity does work or provides energy. The higher the power

raHng of an appliance (in waZs), the greater the amount of electrical energy needed to run the appliance.

FORMULA: Power = voltage x current P = V x I Wa^s = volts x amperes

Sample Power Problems:

1. What is the power of an appliance that is operaHng at a current of 4 amps and 100 volts?

2. What voltage is required to run a 50 waZ light bulb if the current is 0.4 amps?

3. What current is required to run a 700 waZ toaster if the voltage is 150 volts?

Electric Energy used depends on the total power used and the total %me it is used.

FORMULA: Energy = Power x %me E = P x t Kilowa^ hours = kilowa^s x hours

Sample Energy Problems:1. An electric dishwasher uses 2,300 waZs of power. If the dishwasher runs for 7 hours per week, how much energy

does it use? (K H D B D C M)(Hint: To solve for energy, you must change waZs to kilowaZs. 2,300 waZs = _____________ kilowaZs)

2. If the cost of electricity is 8 cents per kWh, how much does it cost to use the dishwasher for one month? (Assume 4.3 weeks in one month.) (Hint: Your answer will be in $.)Cost = kilowa^ house x cost/kilowa^-‐hour

25CLASS PRACTICE

WHICH ONE DO I USE? (ELECTRICITY EDITION)WHAT YOU ALREADY KNOW -‐ UNITSIn everyday life we use units to measure quan??es. When you drink a 20oz. (ounce) bo#le of soda, the volume of the soda is measured in ounces. Changing a light bulb from 75 Wa#s to 100 Wa#s will ensure a brighter light. When you are baking a cake, measuring precisely in cups, teaspoon, and tablespoon can determine whether your cake will rise or lay flat like a cookie.

Recall prefixes have been used to measure more precisely.

King Henry Died By Drinking Chocolate MilkKilo-‐ Hecto-‐ Deca-‐

(base unit)

deci-‐ cen%-‐

milli-‐

Ohm’s LawFill in the symbol for each of the measurements below. Then match the following units with the measurements below. Write the corresponding unit in the space provided.

a.Volts, V b. Amperes, I c. Ohm, Ω

MEASUREMENT SYMBOL UNIT

Voltage

Current

Resistance

What is the equa?on for Ohm’s law? ______________

Solve for voltage: Solve for resistance:

Convert the following units:15 V = ________________ = mV 870098 Ω = __________________ DΩ

63.7 dI = _________________ kI 0.023 Ω = ________________ c Ω

Power Fill in the symbol for each of the measurements below. Then match the following units with the measurements below. Write the corresponding unit in the space provided.

a. Volts, V b. Amperes, I c. Wa#s, W

MEASUREMENT SYMBOL UNIT

Voltage

Current

Power

What is the equa?on for power? ______________

Solve for current: Solve for voltage:

26CLASS PRACTICE

Convert the following units:

72.1 kW = __________________ mW 87.4 mW = ________________ W

3897 V = __________________ HV 3879 dI = ________________ DI

0.004 mI = ________________ dI 58,979,308 W = _______________kW

Calcula%ons

Solve for the missing variable. Put your answer in the space provided.

1. V = 5V I = 10I R = ? _____________

2. V = ? I = 28I R = 7Ω _____________

3. V = 72 V I = ? R = 2.5 Ω ______________

4. V = 20 V I = 0.35I P = ? ________________

5. V = ? I = 32 I P = 7200 W ________________

Bonus: How are power and resistance related?

Using Ohm’s law and the equaCon for power, try to solve for power when given resistance and voltage.

[Hint: Solve Ohm’s law for current. You will need to use subs%tu%on]

V = I x R and P = I x V

If R = 10 Ω and V= 50V, what is the value of power? Box your answer.

27CLASS PRACTICE

Introduction to MagnetismWARM UP:

1. What is the purpose of a compass? _____________________________________________________________

2. In the space below write a list of instruc?ons of how to use a compass correctly to achieve its purpose.___________________________________________________________________________________________

3. What is a compass made of? How does a compass work? _______________________________________________________________________________________________________________________________________

4. Does a compass always work? List some reasons a compass may not work properly.__________________________________________________________________________________________________________________

ACTIVITY: You will need a compass and a bar magnet to complete the following ac?vity.

1. Place your paper square on your desk. Place your compass over the circle below. Note which direc?on the compass is poin?ng. LiN the compass up and draw an arrow in the circle that represents the direc?on the compass

needle was poin?ng.

In reference to landmarks or objects in the classroom, what direc?on is North? ______________________________________________________________________

2. Place a bar magnet in the space below. Place your compass in each of the circles below to iden?fy the direc?on that the compass needle is poin?ng. Draw an arrow in each circle to indicate the direc?on the compass needle was poin?ng at that loca?on. Be consistent when reading the compass and drawing the direc?on of the arrow.

Does a compass needle always point in the same direc?on? __________________________________________

!

28CLASS PRACTICE

1. Using Figure 20-‐1, label the poles of your bar magnet as North and South based on the direc?on of your compass arrows. Draw magne?c field lines around the bar magnet as shown in the book.

2. Double check your observa?ons using another compass to ensure precision.

3. How is a compass able to help you find your way on Earth?__________________________________________________________________________________________

__________________________________________________________________________________________

4. What would prohibit a compass from working properly to find direc?on?

__________________________________________________________________________________________

__________________________________________________________________________________________

29

Electricity and Magnetism Exam ReviewSta%on 1: Defini%onsUsing the card provided, match each of the following terms with a defini3on and an example. Fill in the blanks provided below.

Term Defini%on Example

1. Circuit breaker

2. Conductor

3. Dry cell

4. Electricity

5. Fuse

6. Grounding

7. Insulator

8. Wet Cell

TEST REVIEW

30

Sta%on 2: Calcula%onsRead each of the following ques3ons. Fill in the spaces provided. Be sure to include units, and round to the nearest tenth.

1. Given: Formula: Solve:1. Given: Formula:

Answer:


Answer:


Answer:


Answer:


Answer:

TEST REVIEW

31

Sta%on 3: Series CircuitsMatch the following symbols with the correct term.

Term Symbol

1. Resistor

2. BaDery or Cell

3. Light bulb

4. Switch

Now, using the materials provided, create a series circuit. Raise your hand once your circuit is complete to get your instructor’s approval. Then draw the series circuit using the correct symbols.

Sta%on 4: Parallel Circuit1. What is the difference between a parallel circuit and a series circuit?

____________________________________________________________________________________

Using symbols complete the following:2. Draw a parallel circuit with the following: wire, 2 light bulbs, and 1 baZery.

3. Draw a parallel circuit with the following: wire, 3 light bulbs, and 1 baZery. There should be at least 3 loops.

TEST REVIEW

Teachers Signature

32

Sta%on 5: Lightning AIer reading the passage provided, answer the following ques3ons. Please do not write on the passage.

Comprehension QuesHons

1. What are some things you should do during a thunderstorm to avoid lightning?____________________________________________________________________________________________________________________________________________________________________________________

2. How many Americans are killed by lightning each year?____________________________________________________________________________________________________________________________________________________________________________________

3. What might happen if you are struck by lightning?__________________________________________________________________________________________

4. Why is it dangerous to use a computer or a telephone during a thunderstorm?____________________________________________________________________________________________________________________________________________________________________________________

5. What is the term used for objects like metal that allow electricity to flow through them?__________________________________________________________________________________________

Sta%on 6: The MixVan de Graaf

The image on the leI shows a young girl using a Van de Graaf generator. Using your experience with the generator, answer the following ques3ons:

1.What type of charged parHcle is moving from the generator to the person touching it?______________________________________________________________________

2.If you touch a charged generator, what happens to your hair? Why does this happen?

__________________________________________________________________________________________________________________________________________________________________________________

3. If someone that is not grounded touches the young girl in the picture, what will happen to them?____________________________________________________________________________________________________________________________________________________________________________________

4. If several people make a chain from the young girl in the picture and someone touches her with a metal rod, who will feel the shock?

____________________________________________________________________________________________________________________________________________________________________________________

5. Why does a metal rod cause a shock? _____________________________________________________

TEST REVIEW

33

StaHc electricityUsing the ruler, can you induce a charge and cause the ruler to either aMract or repel the Styrofoam cup? Raise your hand when you are able to do so.

1. What did you do in order to induce a charge?

__________________________________________________________________________________________

2. If the ruler and the cup move closer to each other, what can you conclude about the charges on them?__________________________________________________________________________________________

3. If the ruler and the cup move further apart, what can you conclude about the charges on them?

__________________________________________________________________________________________

Good luck studying for your test!

TEST REVIEW Teachers Signature

34

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HMM...WHAT CAN I DO WHEN I’M DONE?

HOW MANY WORDS CAN YOU MAKE FROM THE LETTERS IN

DEOXYRIBONUCLEIC ACID?NO ABBREVIATIONS ALLOWED EXCEPT THOSE THAT CAN BE FOUND IN A CELL!

MORE WORDS? 1 DEOXYRIBONUCLEIC 112 ACID 123 134 145 156 167 178 189 1910 20

37

HMM...WHAT CAN I DO WHEN I’M DONE?

38

BATHROOM PASS

DATE: ______________TIME: ____________

TO: _________________________________

TEACHER SIGNATURE:___________________

BATHROOM PASS

DATE: ______________TIME: ____________

TO: _________________________________

TEACHER SIGNATURE:___________________

Documents

Unit Book 11 Electricity and Magnitism - WikispacesBook+11+Electricity...• demonstrate that moving electric charges produce magnetic forces and ... WORKSHEET 2 ELECTRICITY AND