3 metallic plates are placed at a separation d1 and d2 as shown in figure. A charge Q is given to the middle plate which is free to move, then
A)it will slide towards left if d2>d1
B)it will slide towards right if d2>d1
The Attempt at a Solution
I found out the charge distributions on the the first and last plate as -Qd2/d1+d2 and -Qd1/d1+d2 resp.
Now to calculate the force on the middle plate due to one plate (say first), shall I take the charge on the middle plate as Q or Qd2/d1+d2 ?