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 $
