AB is a part of an electrical circuit (see figure). The potential difference " VA - VB ", at the instant when current i = 2 A and is increasing at a rate of 1 amp/ second is: (a) 9 volt (b) 10 volt (c) 5 volt (d) 6 volt

Answer: (b). Go from A to B along i: VA - Ldi/dt - 5 - iR = VB (battery crossed from + to -). VA - VB = 1×1 + 5 + 2×2 = 10 V So the answer is (b) 10 volt.

AB is a part of an electrical circuit (see figure). The potential… | NEET 2025

Q16NEET 2025Medium

Combination of Inductors, LR & LC Circuits

$AB$ is a part of an electrical circuit (see figure). The potential difference " $V_A - V_B$ ", at the instant when current $i = 2\text{ A}$ and is increasing at a rate of $1\text{ amp/}$ second is:

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Answer: (b)

Go from $A$ to $B$ along $i$ : $V_A - L\frac{di}{dt} - 5 - iR = V_B$ (battery crossed from $+$ to $-$ ).
$V_A - V_B = 1\times1 + 5 + 2\times2 = 10\text{ V}$
So the answer is (b) 10 volt.

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Combination of Inductors, LR & LC Circuits question from NEET 2025

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