JEE Mains · Physics · STD 12 -6. Electromagnetic induction
In the given circuit the sliding contact is pulled outwards such that electric current in the circuit changes at the rate of \(8 \mathrm{~A} / \mathrm{s}\). At an instant when R is \(12 \Omega\), the value of the current in the circuit will be ______ A.
- A 3
- B 4
- C 5
- D 6
Answer & Solution
Correct Answer
(A) 3
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \varepsilon-\frac{\mathrm{LdI}}{\mathrm{dt}}-\mathrm{IR}=0 \\ & 12-3 \times(-8)-\mathrm{I} \times 12=0 \\ & \mathrm{I}=3\end{aligned}\)
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