# A resistor R and an inductor L are connected in series to a source of voltage. The voltage is found to lead current in phase by . If the inductor is replaced by a capacitor C, the voltage lags behind current in phase by . When L, C and R are connected in series with the same source,Find the :(i) average power dissipated and(ii) instantaneous current in the circuit.

i)

$\\P_{avg}=I_{eff}\times V_{eff}\times cos0=I_{eff}^2R\\\\=\frac{V_0^2}{R}$

ii)

Instantaneous current.

$I=V/R$

$\frac{V_0}{R}sin wt=I_0 sinwt$

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