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  4. A part of a complete circuit is shown in the figure. At some instant, the value of current I is 1A and it is decreasing at a rate of 102As- 1. The value of the potential difference Vp-VQ' (in volts) at that instant, is. <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-n3qbfchkdpsmgz6q.jpg />

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Q. A part of a complete circuit is shown in the figure. At some instant, the value of current I is $1A$ and it is decreasing at a rate of $10^{2}As^{- 1}.$ The value of the potential difference $V_{p}-V_{Q^{'}}$ (in volts) at that instant, is_____. Question

NTA AbhyasNTA Abhyas 2022

Solution:

Solution
$V_{p}+L\cdot \frac{d i}{d t}-30+2i=V_{Q}$
$V_{p}+50 \times 10^{-3}\left(-10^{2}\right)-30+2 \times 1=v_{Q}$
$V_{p}-V_{Q}=35-2=33$