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|,=L\frac{di}{dt}\Rightarrow 1=\frac{L\times { 10-( -10 ) }}{0.5}\Rightarrow L=25mH $



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक