Electro Magnetic Induction And Alternating Currents Question 554

Question: In a coil of self inductance 0.5 henry, the current varies at a constant rate from zero to 10 amperes in 2 seconds. The e.m.f. generated in the coil is [MP PMT 1996]

Options:

A) 10 volts

B) 5 volts

C) 2.5 volts

D) 1.25 volts

Show Answer

Answer:

Correct Answer: C

Solution:

$ \frac{\Delta i}{\Delta t}=\frac{10}{2}=5\ A/\sec $

Þ $ e=L\frac{\Delta i}{\Delta t}=0.5\times 5=2.5\ volts $



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