Electro Magnetic Induction And Alternating Currents Question 578

Question: An average induced e.m.f. of 1V appears in a coil when the current in it is changed from 10A in one direction to 10 A in opposite direction in 0.5 sec. Self-inductance of the coil is [CPMT 2001]

Options:

A) 25 mH

B) 50 mH

C) 75 mH

D) 100 mH

Show Answer

Answer:

Correct Answer: A

Solution:

|e|,=Ldidt1=L×10(10)0.5L=25mH



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