Electro Magnetic Induction And Alternating Currents Question 531
Question: In a transformer, the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere/second in the primary, the induced e.m.f. in the secondary will be [MP PMT 1989]
Options:
A) 5 V
B) 1 V
C) 25 V
D) 10 V
Show Answer
Answer:
Correct Answer: B
Solution:
$ e=M\frac{di}{dt}=0.2\times 5=1\ V $
