Electro Magnetic Induction And Alternating Currents Question 106
Question: If an ac main supply is given to be 220 V. What would be the average e.m.f. during a positive half cycle [MH CET 2002]
Options:
A) 198V
B) 386V
C) 256V
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ V_{av}=\frac{2}{\pi }V_{0}=\frac{2}{\pi }\times (V_{rms}\times \sqrt{2})=\frac{2\sqrt{2}}{\pi }.V_{rms} $ $ =\frac{2\sqrt{2}}{\pi }\times 220=198\ V $
