Expert Answers

1. An iron arrowhead has an initial charge of 1.950e-6 C. How many electrons are required to give it a charge of −2.82 μC?

2. Two grapes are given equal charges and held apart at a distance of 1.1 m. They experience a repulsive force of 2.2 N. Find the magnitude of the charge on each grape

3. An electric field has a value of 350 N/C at a particular point in space, directed along the x axis. What is the force this field exerts at this point on a particle of charge (a) 5.00 μC? (b) −8.25 mC? (c) −525 C? (d) 5.34×10−15 C? Make sure to check the sign of your answer

4. When a test charge of 6.0×10−10 C is placed at the origin, it experiences a force of 2.80e-3 N in the negative x direction from an external electric field. (a) What is the magnitude of the electric field at the origin? (b) If this field is due to a point charge at x = 4.0 m on the x axis, what is the amount of this charge?

5. 6.3 μC point charge and a −1.7 μC point charge are separated by a distance of 0.00024 m. What is the electric potential energy of this system?