An alternating voltage is applied to a series L-C-R circiut. If the current leads the voltage by `45^(@)`, then
An alternating voltage is applied to a series L-C-R circiut. If the current leads the voltage by `45^(@)`, then
A. `X_(L)=X_(C)-R`
B. `X_(L)=X_(C)+R`
C. `X_(C)=X_(L)+R`
D. `R=X_(L)+X_(C)`
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Correct Answer - B
The phase diff. Between I and V is given by
`tan theta = (X_L-X_C)/(R)`
`:. tan 45^(@) = 1 = (X_L-X_C)/R`
`:. X_L-X_C = R or X_L=X_C+R`.
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