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In series L-C-R circuit, resistance, inductance and capacitance are connected in series. The value of potential difference across three are 70 V, 90 V and 65 V respectively. The value of potential difference of A.C. source is …...

Answer»

225 V
95 V
85 V
74.3 V

Solution :`V_R=70V, V_L=90 V, V_C=65` V
`V^2=V_R^2+(V_L-V_C)^2`
`V=SQRT((70)^2 +(90-65)^2)`
`=sqrt((70)^2 + (25)^2)`
`=sqrt(4900+625)`
`=sqrt5525`=74.3 V


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