1. Assuming all the bulbs are identical,
a. Give comparative brightness between B3 and B5.
b. Give comparative brightness between B1 and B4.
c. If I1= 8 x 10¹⁰ electrons/s,
What is I3=?
What is I5=?

2.A single wire across the top of the compass causes a deflection of 30° in needle. If it is now curved back under the compass lined up with the wire on top, the needle will now have:

a. No deflection at all.
b. Only slightly less deflection.
c. Only slightly more deflection.
d. Same deflection in the opposite direction.
e. Twice the deflection in the same direction.

3).If two bulbs are hooked in series as indicated below, B1 is the only one that lites . Give a careful explanation for why this is happens.

4. Bringing a negative charge closer to a positive charge causes the potential energy of the system made up of the two charges to:

a. Increase
b. Decrease
c. Stay the same

5. A charged particle is released in an electric field. The work done by the electric field on the particle increases its potential energy if the particle is :

a. Positive
b. Negative
c. Either
d. Neither

6. Show the path of the electron as it passes thru the plates charged as indicated.

9. For each situation below, decide qualitatively whether the initial or final situation has higher electric potential energy. You might try to decide if positive or negative work is needed to change from the initial to the final situation. (Circle the correct symbol in the third column)