TS EAMCET · Physics · Electromagnetic Induction
A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of \(25 \mathrm{~A}\) in a millisecond, is present in the primary coil. If the mutual inductance is \(92 \times 10^{-6} \mathrm{H}\), then the value of induced emf in the secondary coil is
- A \(4.6 \mathrm{~V}\)
- B \(2.3 \mathrm{~V}\)
- C \(0.368 \mathrm{mV}\)
- D \(0.23 \mathrm{mV}\)
Answer & Solution
Correct Answer
(B) \(2.3 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
The induced emf in secondary coil. \(e=M \frac{d i}{d t}=92 \times 10^{-6} \times \frac{25}{1 \times 10^{-3}}=2.3 \mathrm{~V}\)
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