Question a negative charge q-055 coulombs is plaved above, Ask an Expert

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Question: A negative charge (q=-0.55 coulombs) is plaved above the floor that has a postive charge. The floor creates a uniform electric field that has a magnitude of 105 N/C.

a) What is the magnitude and direction of the electric force caused by the floor on the negative charge?

b) If the charge is initially at a distance 2.5m above the plane, what will the change in electric potential energy(in joules) be if it is then moved to a distance 1.25m above the plane. (specify whether this change is postive/negative/zero).

Please explain each step in detail.

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