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Question: Answered & Verified by Expert
A positive charge q is given to each plate of a parallel plate air capacitor having plate area A and plate separation d, then
PhysicsElectrostaticsNEET
Options:
  • A since both the plates are identically charged, therefore, capacitance becomes equal to zero
  • B energy stored in the space between the capacitor plates is equal to q2ε0A2
  • C no charge appears on inner surface of the plates
  • D potential difference between the plates is equal to 2qdε0A
Solution:
1759 Upvotes Verified Answer
The correct answer is: no charge appears on inner surface of the plates
Capacitance does not depend on charge on it, C=ε0Ad



In final charge distribution, Charge on outer plates q1=q4=q and inner plates q2=q3=0

As charge on inner plates are zero so there is no field between the plates and no potential difference and no energy is stored.

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