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