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A solenoid of inductance L and resistance r is connected in parallel to a resistance...

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A solenoid of inductance L and resistance r is connected in parallel to a resistance R and a battery of emf E Initially the switch is closed for long time and at t 0 switch S is opened Then which of the following is wrong L r ooooo R www i s E 1 Current through solenoid at any time t after E R r t L opening the switch is r 2 Induced emf across solenoid at time E R r t 0 is r 3 Amount of heat generated in solenoid is E L 2r r R 4 Potential difference across solenoid at t 0 is E

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