Electro Magnetic Induction And Alternating Currents Question 85

Question: A generator produces a voltage that is given by V=240sin120,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:

ν=ω2π=120×72×22=19 Hz Vr.m.s.=2402=1202170 V



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