Questions
A resistance of is connected to a source of an alternating potential . The time taken by the current to change from the peak value to rms value, is
detailed solution
Correct option is D
Both V and I are in the same phase. So, let us calculate the time taken by the voltage to change from peak value to rms value. Now 220=220 sin100πt1or 100πt1=π2 or t1=1200sAgain, 2202=220 sin 100πt1or 12=sin 100πt2 or 100πt2=3π4or t2=3400sRequired time =t2-t1=1400s=2.5×10-3sSimilar Questions
A current is made up of two components 3A DC component and AC component given by . The effective value of current is
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