Q.

The work done in increasing the voltage across the plates of a capacitor from 5 V to 10 V is W. The work done in increasing the voltage from 10 V to 15 V will be :

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a

W

b

4W3

c

5W3

d

2W

answer is C.

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Detailed Solution

Work done ∝ Change in stored energyor W∝V22-V12W2W1=152-102102-52=225-100100-25=12575=53⇒W2=53W
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The work done in increasing the voltage across the plates of a capacitor from 5 V to 10 V is W. The work done in increasing the voltage from 10 V to 15 V will be :