Name_____________________________
Electric Fields and Forces Worksheet
1. An electric field of 260,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -7.0 mC at this spot?
2. A tiny ball (mass = 0.012 kg carries a charge of -18 mC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground? (To put it another way, what electric field is needed to apply a force that will balance the balls weight.)
3. A test charge in an electric field of strength 21.45 N/C experiences a force of 5.10N. What is the magnitude of the test charge?
4. Calculate the repulsive force between two protons in the nucleus of an atom of iron separated by a distance of 3.8 x 10-15 m.