Upload
odin
View
29
Download
0
Embed Size (px)
DESCRIPTION
HW: 6.2 PTG, Pg. 612-613, #1-4. LO: Use a physical model to describe the flow of electric charges in series and parallel circuits. SC: Develop a physical model for electric current and potential energy - PowerPoint PPT Presentation
Citation preview
HW: 6.2 PTG, Pg. 612-613, #1-4 LO:
Use a physical model to describe the flow of electric charges in series and parallel circuits.
SC: Develop a physical
model for electric current and potential energy
Use this physical model to trace the flow of electric charges in series and parallel circuits.
DO NOW: Write LO and SC on
new left side page WDYS/WDYT-pg.
606 Investigate
Part A: vocabulary with pretzels
Ch 6 Section 2 Students assemble like picture on page
607. Teacher = switch 1 student = battery 1 student – light bulb Rest = charges (only charged when
student has pretzel in their hand)
Part A Round 1
Battery=energy supply=joules=pretzels Light bulb=dancing student Electric charges=coulomb=students
Part A Round 2:
Battery=energy supply=joules=pretzels “I am one VOLT, which means, I am one joule
(pretzel) of energy to each coulomb (student)” “Please move along, one coulumb (student) per
second is one amp of current” Light bulb=dancing student
“I just received one joule (pretzel) of energy from that coulomb (student)
Electric charges=coulomb=students “I just gained one joule of energy from the battery” “I just gave one joule of energy to the light bulb”
Part A Round 3
Battery is 3 Volts Gives each coulomb 3 joules of energy
Part A Round 4
Battery is 1 Volt Current is 2 amps=2 coulombs per second
Students answer… #9 page 608: a, b, c, d, e, f
HW: 6.2 PTG, Pg. 612-613, #1-4 LO:
Use a physical model to describe the flow of electric charges in series and parallel circuits.
SC: Develop a physical
model for electric current and potential energy
Use this physical model to trace the flow of electric charges in series and parallel circuits.
DO NOW: Describe the
difference between a joule and a volt.
Agenda Investigate
Part B: vocabulary with pretzels
Part B Series circuit
2 light bulbs, each must get some energy Battery is 1 Volt Charges have to spread their joule (pretzel) to
each light bulb equally
Students answer… #2 a #3 a, b, c, d
#4 1V battery = 1 J of energy (pretzel) for each
coulomb (student) of charge Charges flowed at the rate of 1 amp (or 1
coulomb per second=1 student per second) The # of Joules (pretzels) per second that a
bulb receives determines how BRIGHT the bulb is
Joules per second=Power (measured in Watts) 1 Watt=1 Joule/sec Which will be brighter? A 100-W bulb or a 40-
W bulb? Why?
Students answer… #4a: copy table at top page 609
Vocabulary Boxes Potential energy Electric potential
energy Battery Resistor Coulomb Current
Voltage Volt Joule Ampere Series circuit Watt
HW: 6.2 PTG, Pg. 612-613, #1-4 LO:
Use a physical model to describe the flow of electric charges in series and parallel circuits.
SC: Develop a physical
model for electric current and potential energy
Use this physical model to trace the flow of electric charges in series and parallel circuits.
DO NOW: Find the joules per
second for a 3 volt battery, with a 5 amp current.
Investigate Part A: vocabulary
with pretzels
Physics Talk Expectations Volume
Actions
Questions?
Finished with the slide?
Students are quiet and headphones are off
Notebooks are out and pencils are recording information from the board
Students must raise their hand to ask or answer questions.
Please wait patiently without talking or distracting your neighbor
Physics Talk 6.2 How is your
bloodstream similar to an electric current?
Like blood cells, electrons carry energy to the light bulb. The energy is used up (pretzel/joule), but the electron is not (student)
Physics Talk 6.2 What is electrical
potential energy? Energy that has not
yet been used up and is being held by an electron or battery
Physics Talk 6.2 What is a resistor? An object in an
electrical circuit that consumes energy. This object will often determine how quickly the electrons can pass by (current)
Physics Talk 6.2 An explanation of
the electron shuffle
Physics Talk 6.2 What is a series
circuit? An electrical circuit
where there is only one path for the electrons to follow
The electrons move with the same current throughout the entire circuit
Physics Talk 6.2 How do we
represent a series circuit?
Physics Talk What determines
the brightness of a light bulb?
The number of Watts, or Joules per second.
You can use the following equation for a series circuit (thank you Ayo and Arthur)
W = Power V= Volts A= current (amperes) R = resistors, or
number of light bulbsRAVW
Essential Questions p 61210 minutes
What does it mean? How do you know? Why should you care?
Expectations Stay in your seat Speak at a whisper with your neighbor Record Answers in notebook
Vocabulary BoxesBook Definition – Your Definition – Picture
Potential energy Electric potential
energy Battery Resistor Coulomb Current
Voltage Volt Joule Ampere Series circuit Watt
ExpectationsStay in your seatSpeak at a whisper with your neighborRecord Answers in notebook