Electrostatics 5 Question 43

45. Two parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference V. The battery is then disconnected and the region between the plates of capacitor C is completely filled with a material of dielectric constant K. The potential difference across the capacitors now becomes….

(1988, 2M)

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Answer:

Correct Answer: 45. (3K+2)V

Solution:

  1. Total charge will remain unchanged.

Hence, Q=Q or 3CV=(KC+2C)V



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