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An LR circuit with a battery is connected at t=0. Which of the following quantities is not zero just after the connection?A. Current in the circuitB. Magnetic field energy in the inductorC. Power delivered by batteryD. emf induced in the inductor |
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Answer» Correct Answer - A::B::C Initialy current `I=0, so U=1/2 Li^(2)=0` `P=ei=0` But initially `(di)/(dt) != 0`, so `e=L(di)/(dt) != 0`. |
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