1.

Voltage obtained in one A.C. generator V=V_0 cos omegat . If V_0 = 10 volt and frequency v=50 Hz then voltage at time t=1/600s wiil be _____

Answer»

10 V
5 V
`5sqrt3V`
1V

Solution :We are given `V=V_0 COS (omegat)`
`THEREFORE V=V_0 cos (2pivt) (because omega=2piv)`
`=10 cos (2pixx50xx1/600)`
`=10 cos (pi/6)`
`=10xxsqrt3/2`
`therefore V=5sqrt3` volt


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