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If the charge on a capacitorn is increased by 2C, then the energy stored in it increases by 20 %. The original charge on the capacitor isA. 10 CB. 20 CC. 30 CD. 40 C |
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Answer» Correct Answer - B `U_(1) =(q_(1)^(2))/(2C ) , U_(2) =(q _(2)^(2)) /(2C ) = 1.21 U_(1)` ` implies q _(2)^(2) = 1.21 q_(1)^(2) implies q^(2) = 1.1 q_(1)` `implies Delta q= 0.1 q_(1) = 2C implies q_(1) = 20 C ` |
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