Questions
The magnetic field energy in an inductor changes from maximum value to minimum value in 5 ms when connected to an AC source, the frequency of the source is
detailed solution
Correct option is B
t=T4⇒5=T4⇒T=20 ms=20×10-3s f=lT=120×10-3=100020=50Hz .Talk to our academic expert!
Similar Questions
The potential difference V and the current i flowing through an instrument in an ac circuit of frequency f are given by volts and I = 2 sin t amperes (where ). The power dissipated in the instrument is
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