Electrostatics Question 79

Question: An air capacitor of capacity $ C=10\mu F $ is connected to a constant voltage battery of$ 12V $ . Now the space between the plates is filled with a liquid of dielectric constant 5. The charge that flows now from battery to the capacitor is [MP PMT 1997]

Options:

A) $ 120\mu C $

B) $ 699\mu C $

C) $ 480\mu C $

D) $ 24\mu C $

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Answer:

Correct Answer: C

Solution:

Initially charge on the capacitor $ Q=10\times 12=120\mu C $

Finally charge on the capacitor $ Q’=(5\times 10)\times 12=600\mu C $

So charge supplied by the battery later $ =Q’-Q=480\mu C $



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