Question

A current of 2 A is passed through the primary coil. The total flux linked with the secondary coil, which is closely wound over the primary is \( 2000 \times 10^{-6} \, \text{weber} \). What is the induced emf in the secondary if the current through the primary increases at a rate of \( 0.2 \, \text{A s}^{-1} \)?

• A. \( 2 \times 10^{-4} \, V \)
• B. \( 4 \times 10^{-4} \, V \)
• C. \( 1 \times 10^{-4} \, V \)
• D. \( 8 \times 10^{-4} \, V \)

Hint:

Mutual inductance relates flux in one coil to current in another. Always compute \( M \) first if flux and current are given.

Answer 1

The Correct Option is A