Electro Magnetic Induction And Alternating Currents Question 85
Question: A generator produces a voltage that is given by $ V=240\sin 120,t $ , where t is in seconds. The frequency and r.m.s. voltage are [MP PET 1993; MP PMT 1990]
Options:
A) 60 Hz and 240 V
B) 19 Hz and 120 V
C) 19 Hz and 170 V
D) 754 Hz and 70 V
Show Answer
Answer:
Correct Answer: C
Solution:
$ \nu =\frac{\omega }{2\pi }=\frac{120\times 7}{2\times 22}=19\ Hz $ $ {V_{r.m.s.}}=\frac{240}{\sqrt{2}}=120\sqrt{2}\approx 170\ V $
