1. Oppositely charged parallel plates are separated by 5.35 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? (b) How much work does the electric field do moving an electron from the negative plate to the positive plate? 2. A hollow metal sphere has a radius Of 5.00 cm. if an excess charge of 30.0 JC resides on the sphere, what is the electric potential 10.0 cm from the surface of the sphere