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 $



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