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Physics Bell ringer
• Get a board and marker
• Quietly wait for review
Review Game Eureeka
1. What sub-atomic particle is responsible
for the acquiring of static charge?
2. A negatively charged object is
brought near a negative electroscope, what will happen to the leaves?
3.Draw a series circuit consisting of a 9-V
source, a 2-Ω and a 4-Ω resistor
Leave it on your board
Using a 3-A current:
4. Which of the resistors will have the
highest potential energy drop
associated with it?
5. The Coulomb is the unit to measure
what?
6. If the charge on each of two small spheres doubles,
what will happen to the force of gravity
between them?
It stays the same
Δcharge doesn’t Δ gravity heehee
6. It takes 15-J to move 3-C of positive charge. What is the Electric potential at
this point?
7. Which will have more resistance…
A small/large wire
A long/short wire
A copper or glass wire
8. If the voltage across a 12-Ω resistor is 4.0-V, the current
through the resistor is what?
9. The electrical resistance of a metal wire could be decreased
by• Increasing the diameter
• Increasing its length
• Increasing its temperature
10. If the temperature of a conductor is
increased, the amount of current at 10-Volts
would do what?
11. If the length of a conductor increased
what would happen to the amount of current in a 10-Volt carrying
wire?
14. What is the potential difference of the
source?10-V 10-V 10-V
16. What is the current through the second resistor?
3.0 Ω3.0 Ω3.0 Ω
3.0-V
Calculate the power dissipated in a 100-Ω resistor if there is a
4.0-V potential difference established
across it.
The Milikin oil drop experiment showed
the existence of what?
1.6 x 10-17 Coulombs
19. A charge of 100-elementray charges is
equivalent to how many Coulombs?
It becomes 1/9 as strong
As the distance b/t two point charges is
tripled, what happens to the force b/t the
charges?
21. A charge of 5.0-C moves through a
circuit in 0.5-seconds. How much current is flowing in the circuit?
Interlude for random guessing
Which picture am I thinking of?
23. The graph below shows the relationship b/t potential difference and current for four
resistors
Which resistor has the greatest resistance?
Draw a Voltage vs.Current graph referring to a real material as
opposed to one following Ohm’s Law
Current
Vo
ltag
e
That is the end
• Your test is Wednesday
• Tally your points