The following series L-C-R circuit , when driven by an emf source of angular frequency 70 kilo-radians per second , the circuit effectively behaves like

Options

A. Purely resistive circuit
B. Series R-L circuit
C. Series R-C circuit
D. Series L-C circuit with R=0

Answer

C

Explanation

`omega = 70 xx 10 ^(3) rad // sec`
`X_(L) = omega L = 70 xx 10 ^(3) xx 100 xx 10 ^(-6) = 7 Omega `
`X_(C) = (1)/(omegaC) = (1)/( 70 xx 10 ^(3) xx 10 ^(-6)) = (1)/(7) xx 10^(2) = (100)/( 7) Omega `
As `X_(C) gt X_(L)`
Behave as RC circuit