Question

Three large identical conducting plates are arranged as shown in figure. If charges Q, 2Q and Q are given to these conductors, then charge on surface 3 is 1 2 3 4 5 6 Q 20 Q​

Answer 1

Answer:

The electric field at any point outside of conducting plate is E=

2ϵ

0

σ

=

2Aϵ

0

Q

where Q= charge on plate and A= area of it.

Here the field at A is E

A

=

2Aϵ

0

1

[Q−(−Q+2Q)]=0

The field at B is E

B

=

2Aϵ

0

1

[(Q−Q)−2Q)]=−

Aϵ

0

1

The field at C is E

C

=

2Aϵ

0

1

[Q−Q+2Q)]=

Aϵ

0

1

In magnitude, E

B

=E

C