A series `LCR` circuit containing a resistance of `120 Omega` has angular resonance frequency `4 xx 10^(5) "rads"^(-1)`. At resonance the voltages across resistance and inductance are `60 V` and `40 V` respectively. (a) The value of `L` and `C` are `0.2` mH, `1/32 muF` (b) If angular frequency is changed to `8xx10^(5) "rad"//s`, the current lags the voltage by `45^(@)` (c) If angular frequency is charged to `6xx10^(5) "rad"//s`, the current lags the voltage by `45^(@)`A. (a),(c ) are correctB. (a),(b) are correctC. (a),(b) (c ) are correctD. (a),(b),(c ) are wrong

A series `LCR` circuit containing a resistance of `120 Omega` has angu

1.	A series `LCR` circuit containing a resistance of `120 Omega` has angular resonance frequency `4 xx 10^(5) "rads"^(-1)`. At resonance the voltages across resistance and inductance are `60 V` and `40 V` respectively. (a) The value of `L` and `C` are `0.2` mH, `1/32 muF` (b) If angular frequency is changed to `8xx10^(5) "rad"//s`, the current lags the voltage by `45^(@)` (c) If angular frequency is charged to `6xx10^(5) "rad"//s`, the current lags the voltage by `45^(@)`A. (a),(c ) are correctB. (a),(b) are correctC. (a),(b) (c ) are correctD. (a),(b),(c ) are wrong
Answer» Correct Answer - B `i = (V)/(R ), V_(L)` and `iomega_(0) L` `V_(c ) = (i)/(omega_(0)C)` and `Tan 45^(@) = ((omega L + (1)/(omega C)))/(R )`

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