1. Spring review

2. Identify the following true statements?
A proton is attracted to an electron
An electron is repelled by a neutron
A proton is repelled by another proton
Both protons and electrons are free to move around in metals

3. A charged rod is brought near but not touching two neutral conductors
A charged rod is brought near but not touching two neutral conductors. Which arrangement describes the charges on the two spheres?

4. Which statements are true about conductors and insulators?
Conductors are materials that allow both electrons and protons to freely move
The electrons on insulators are fixed in place
Conductors freely allow electrons to flow while insulators restrict their flow.
Insulators have different degrees of holding power

5. The charged conductor below could be charged by which of the processes
Negative charge rod through induction
Positive charge rod through induction
Negative rod through conduction
Positive charge rod through conduction

6. A neutral conductor is placed on a positively charged insulator
The conductor remains uncharged but the charge has been rearranged
The conductor has a positive charge
The conductor has a negative charge

7. Which of the following statements are true concerning grounding?
Negative charges move to the earth to neutralize a Negatively charged object
Negative charges move from the earth to neutralize a Positivly charged object
An uncharged object becomes charged by the earth
Both 1 and 2

8. Which statement is true about an electric field?
Are lines of force
Represents the path a positive test charge would move
Are strongest where the lines are closest
All of the above

9. An electron is placed in an electric field shown below, which of the following statements are true?
The electron is pulled to the left with increasing force
The electron is pulled to the right with increasing force
The electron is pulled to the right with decreasing force -e

10. Two identical charges experience a force F, are moved twice as far, what is the new force?

11. Two identical charges experience a force F, are moved three times as close, the force is now?

12. Three identical bulbs are connected in series which of the following is true?
The current is the same
The voltage is the same
Both current and voltage is the same

13. Which of the following is true if the resistance for each bulb is different ?
The current is the same but the voltage drop will change
The voltage drop is the same but the current changes
Both current and voltage is the same

14. I1=I2=I3 I3 >I2>I1 I3 <I2<I1
If the resistance of each bulb increases B3 > B2> B1 What can be said about the current in each bulb ?
I1=I2=I3
I3 >I2>I1
I3 <I2<I1

15. V1=V2=V3 V3 >V2>V1 V3 <V2<V1
If the resistance of each bulb increases B3 > B2> B1 What can be said about the Voltage drop in each bulb ?
V1=V2=V3
V3 >V2>V1
V3 <V2<V1

16. Which of the following is a correct expression for the equivalent resistance
1/[1/(R4 + R5 + R6)+1/(R2 + R3)] + R1
R1 + 1/(R2+R3) + 1/(R4 + R5 + R6)
(R2xR3)/(R4+R5+R6) + R1

17. Ammeter in series and Voltmeter in parallel
Which of the following statement describes the best way to hook up and ammeter and voltmeter?
Ammeter in series and Voltmeter in parallel
Ammeter in series and voltmeter in series
Ammeter in parallel and voltmeter in series

18. Which of the following demonstrates the proper direction of the magnetic field induced by a current carrying wire? x 3. 4.

19. Which of following represents the correct magnetic field induced by a current carrying wire?x x 3. 4.

20. Which electromagnet shows the proper polarization?
1. N S.
+ - 2.
N S
3. S N

21. A positive charge ion moves to the right in a magnetic field into the page, what direction is the force acting on it? Up
Down
Left
Right
X X X X X X X X X X X X X

22. What can be done to increase the speed of a motor?
Increase the current
Increase the magnetic field
Increase the loops of wire
All of the above

23. The speed of a mechanical wave is dependent on
Wave legnth
Frequency
Period
Medium

24. Which of the following is not true about light
Light needs a medium to travel in
Light slows down in denser substances
Light travels the fastest in a vacuum
Light is a electromagnetic wave

25. Which of the following is not true about the refraction of light
When n1 < n2 light bends toward the normal
When n1 > n2 light bends toward the normal
When n1 > n2 light is refracted at all angles

26. For a given medium as the frequency goes up
The wave-length decreases
The wave-length increases
The speed increases
The speed decreases