Figure In the given circuit the sliding contact is pulled outwards such that electric current in the circuit changes at the rate of 8 A/s. At an instant when R is 12, the value of the current in the circuit will be ________ A. [2025]

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Solution

Q.

In the given circuit the sliding contact is pulled outwards such that electric current in the circuit changes at the rate of 8 A/s. At an instant when R is 12 $Ω$ , the value of the current in the circuit will be ________ A. [2025]

Ans.
(3)

$ε - \frac{L d I}{d t} - I R = 0$

$12 - 3 \times (- 8) - I \times 12 = 0$

$\Rightarrow I = 3 A$

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