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An alternating voltage is applied to a s...

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)`

Text Solution

Verified by Experts

The correct Answer is:
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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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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