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in Physics by (25.6k points)

A variable capacitor is connected to a 200V battary. If its capacitance is changed from 2μF to XμF, the decrease in energy of the capacitor is 2 x 10-2J. The value of X is -

(a) 1μF

(b) 2μF

(c) 3μF

(d) 4μF

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