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 $
