Question

A. (multiple choice) A 50.0 nC charge is located 40.0 cm from a -30.0 nC charge. What is the direction of the force exerted on the negative charge by the positive charge?

1. left

2. right

3. up

4. down

b. (multiple choice) For the same two charges as in question A, what is the magnitude of the force exerted on one charge by the other?

1. 1.5 N

2. 3.75 x 10^-3 N

3. 1.25 x 10^-4 N

4. 8.4 x 10^-5 N

5. 6.2 x 10^-4 N

C. (multiple choice) Find the force on a 2.1×10^−6 C charge in a 3.0×10^5 N/C electric field.

1. 0.00028 N

2. 0.14 N

3. 4.4 N

4. 7.0 N

5. 0.63 N

Answer 1