1.

In an A.C. series circuit of L-R voltage applied is 220 V, if the potential difference across two ends on inductor is 176 V then the potential difference across two ends of the resistance will be ……

Answer»

44 V
110 V
132 V
220 V

Solution :
USING Kirchoff.s second law for CLOSED loop,
`V^2=V_R^2+V_L^2`
`therefore V_R^2=V^2-V_L^2`
`=(220)^2 - (176)^2`
=48400-30976 = 17424
`therefore V_R`= 132 V


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