Question

1.

a.) An object carries a charge of -6.1 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from the first to the second object so that both objects have the same charge?

b.) Suppose a thin conducting wire connects two conducting spheres. A negatively charged rod is brought near one of the spheres, the wire between them is cut, and the charged rod is taken away. Which one of the following is true?

The spheres will attract each other.

The spheres will repel each other.

There will be no electrostatic force between the spheres.

c.) When you bring a negatively charged rod near a piece of electrically neutral plastic it attracts it. What happens if you instead bring a positively charged rod near the plastic?

It attracts.

It repels.

There is no force between the rod and the plastic.

d.) Charge q1 is placed a distance r0 from charge q2. What happens to the magnitude of the force on q1 due to q2 if the distance between them is reduced to r0/4?

The force increases by a factor of 16.

The force increases by a factor of 4.

The force increases by a factor of 8.

The force increases by a factor of 2.

e.) What is the electrostatic force between and electron and a proton separated by 0.1 mm?

2.3 × 10-20 N, attractive.

2.3 × 10-20 N, repulsive.

2.3 × 10-18 N, attractive.

2.3 × 10-18 N, repulsive.

2.3 × 10-16 N, attractive.

Answer 1

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