Plate A of a parallel air filled capacitor is connected to a nonconducting spring having force constant k and plate B is fixed. If a charge + q is placed on plate A and charge – q on plate B then find out extension in the spring in equilibrium. Assume area of plate is ‘ A ’ .
Text Solution
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CHECK THE SOLUTION.
Sol. F attractio = 
; F Repulsion = kx
|F attraction | = |F Repulsion |
⇒ 
= kx
x = 
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