Question

There are three conducting plates placed very near and parallel to each other as shown below. What will be the charge on face 3 if mentioned charges are provided to the plates?

• A. -3 C
• B. 3 C
• C. -9 C
• D. 0 C

Answer 1

The correct option is B 3 C

Charges on face1 and face6 will be=18/2 C=9 C
If 9C resides on plate 1, -3 C has to reside on face 2 as the net charge is conserved.

Which further implies that +3C will come on face 3 which is directly opposite to face 2.