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The work done against electric in increasing the potential difference of a condenser from 20 V to 40 V is W. The work done in increasing its potential

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The work done against electric in increasing the potential difference of a condenser from 20 V to 40 V is W. The work done in increasing its potential difference from 40 V to 50 V will be
A. 4W
B. `(3W)/(4)`
C. 2W
D. `(W)/(2)`
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Correct Answer - C
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