Electro Magnetic Induction And Alternating Currents Question 103

Question: The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120V. Then the r.m.s. value of voltage is [BHU 1999; MH CET (Med.) 2001; KCET (Med.) 2001; MH CET 2003]

Options:

A) 101.3V

B) 84.8V

C) 70.7V

D) 56.5V

Show Answer

Answer:

Correct Answer: B

Solution:

$ V_{rms}=\frac{V_{0}}{\sqrt{2}}=\frac{120}{1.414}=84.8\ V $



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