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  4. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/0d9729b1907a172c5194a1644bd0dfdd-.png /> As per the given figure, if ( dI / dt )=-1 A / s then the value of V AB at this instant will be V

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Q. image
As per the given figure, if $\frac{ dI }{ dt }=-1 A /$ s then the value of $V _{ AB }$ at this instant will be ______$V$

JEE MainJEE Main 2023Electromagnetic Induction

Solution:

image
$\frac{ dI }{ dt }=-1 \frac{ A }{ \sec }$
$ V_A-I R-L \frac{d I}{d t}-12=V_B $
$ V_A-2 \times 12-6(-1)-12=V_B $
$ V_A-V_B=36-6=30 $ volt