InterviewSolution
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InterviewSolution
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The energy required to charge a parallel plate condenser of plate separtion `d` and plate area of cross-section `A` such that the unifom field between the plates is `E` isA. `epsilon_(0)E^(2)Ad`B. `(1)/(2)epsilon_(0)E^(2)Ad`C. `(1)/(2)epsilon_(0)E^(2)//Ad`D. `epsilon_(0)E^(2)//Ad` |
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Answer» Correct Answer - A Energy stored in capacitor for field `E=(1)/(2)CV^(2)` `=(1)/(2)((epsilon_(0)A)/(d))(E.d)^(2)` `=(1)/(2)epsilon_(0)AE^(2)d` Energy stored in capacitor `+` Energy loss in the process of charging = Energy given by cell. `=(Aepsilon_(0))/(d)V^(2)` `=2xx" Energy stored in capacitor"` Since energy stored in capacitor = Energy loss in the process of storing the charge in capacitor. |
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