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Physics · PYQ NEET UG 2025
हिन्दीAB 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:
Correct answer · Option 4
\( 10\text{ volt} \)
Explanation
Using Kirchhoff's loop rule from A to B: \( V_A - L\frac{di}{dt} - E - iR = V_B \implies V_A - V_B = L\frac{di}{dt} + E + iR = (1)(1) + 5 + (2)(2) = 1 + 5 + 4 = 10\text{ V} \).
