Answers to Physics Module Questions - Module #22

1. Two charges are separated by a distance of 1 meter, and experience a mutual repulsive force of 1 Newton. If the distance between the charges is changed to 2 meters, what is the resulting repulsive force?
1. 1 N
2. 2 N
3. 4 N
4. 8 N
5. 1/2 N
6. 1/4 N
7. 1/8 N

2. What does a lightning rod do?
1. Attracts lightning to your building
2. Repels lightning from your building
3. Collects electrons from your building
4. Collects protons from your building
5. Reduces charge buildup on your building
6. not enough information provided
7. none of the above
8. all of the above

3. Two charged particles are held at a certain distance from each other. When they are released, they move and the force on each particle decreases. The particles MUST both be
1. positive
2. negative
3. of the same sign
4. of opposite sign
5. not enough information provided
6. none of the above
7. all of the above

4. If the electrical potential of a single electron is 1-volt in an electrical field, what is the electrical potential of 10 electrons at the same spot in the field?
1. 10 volts
2. 100 volts
3. 1000 volts
4. 1 volt
5. 1/10 volts
6. 1/100 volts

5. A pith ball is suspended by a non-conducting fiber. When a positively charged rod is brought near the ball, but without touching it, the ball
1. becomes positively charged
2. becomes negatively charged
3. becomes lighter
4. becomes heavier
5. becomes depolarized
6. becomes polarized