Electro Magnetic Induction And Alternating Currents Question 565

Question: The mutual inductance of an induction coil is $ 5H $ . In the primary coil, the current reduces from $ 5A $ to zero in $ {{10}^{-3}}s $ . What is the induced emf in the secondary coil [RPET 1996]

Options:

A) $ 2500V $

B) 25000V

C) 2510V

D) Zero

Show Answer

Answer:

Correct Answer: B

Solution:

$ e=-M\frac{di}{dt}=-5\times \frac{( -5 )}{{{10}^{-3}}}=25000\ V $



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