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 $
