1. An electric field of magnitude 0.450 N/C exerts a force of 8.00 x 10–4 N on a test charge placed in the field. What is the magnitude of the test charge?

2. An electric field of magnitude 0.370 N/C exerts a force of 6.20 x 10–4N on a test charge placed in the field. What is the magnitude of the test charge?

3. What force is exerted on a test charge of 3.86 x 10–5 C if it is placed in an electric field of magnitude 1.75 x 104 N/C?

4. What force is exerted on a test charge of 4.00 x 10–5C if it is placed in an electric field of magnitude 3.00 x 106 N/C?