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Question

When air is replaced by a dielectric medium of constant K, the capacity of the condenser:


A
increases K times
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B
increases K2 times
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C
remains unchanged
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D
decreases K times
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Solution

The correct option is A increases K times
We know, capacity: C=ε0Ad
Now when air is replaced by dielectric medium of constant k
C=Kε0Ad
This implies that the capacitance increases K times.

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