Charge is distributed uniformly on the surface of a large flat plate.The electric field 2 cm from the plate is 30 N/C.The electric field 4 cm from the plate is:
A)120 N/C
B)60 N/C
C)30 N/C
D)15 N/C
E)7.5 N/C

Question

Quizplus · Accepted Answer

The electric field due to a uniformly charged infinite plane is constant and does not depend on the distance from the plane. Therefore, if it is 30 N/C at 2 cm, it will remain 30 N/C at any other distance, including 4 cm.

Charge Is Distributed Uniformly on the Surface of a Large