AB is a part of an electrical circuit (see figure). The potential difference " V _ A - V _ B ", at the instant when current i =2 ~A and is increasing at a rate of 1 amp / second is :

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Correct answer: D. 10 volt

aligned & Apply K.V.L. \ & aligned & V _ A - LdI dt -5- IR = V _ B \ & ~V _ A - V _ B = LdI dt +5+ IR \ & =1 1+5+2 2 \ & =1+5+4 \ & =10 ~V aligned aligned

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