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
detailed solution
Correct option is A
V=5cosω t=5sinω t+π2 and i=2sinω tPower =Vr.m.s.×ir.m.s.×cosφ= 0(Since φ=π2, therefore cosφ=cosπ2=0)Talk to our academic expert!
Similar Questions
In an ac circuit I = 100 sin 200 t. The time required for the current to achieve its peak value will be
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