Alternating Cur...

An inductor $$20$$ mH, a capacitor $$100$$ $$\mu$$F and a resistor $$50$$ $$\Omega$$ are connected in series across a source of emf, V$$=10$$ $$\sin 314$$t. The power loss in the circuit is?

A coil has resistance $$30   ohm$$ and inductive reactance $$20   ohm$$ at $$50   Hz$$ frequency. If an $$ac$$ source of $$200   volt,  100   Hz$$, is connected across the coil, the current in the coil will be

A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when

A series R-C circuit is connected to an alternating voltage source. Consider two situation:
(a) When capacitor is filled
(b) When capacitor is mica filled
Current through resister is i and voltage across capacitor is V then :

A $$40 \mu F$$ capacitor is connected to a $$200 V,\ 50 Hz \ ac$$ supply. The rms value of the current
in the circuit is, nearly :

A condenser of $$250\mu F$$ is connected in parallel to a cell of inductance $$0.16$$ mH, while its effective resistance is while its. Determine the resonant frequency.

In a series LCR circuit, the voltage across the resistance, capacitance and inductance is $$10\ V$$ each. If the capacitance is short circuited the voltage across the inductance will be :

Reciprocal of Impedance is:

A $$10\ \mu F$$ capacitor is connected across a $$200\  V$$, $$ 50 \ Hz$$ A.C. supply. The peak current through the circuit is :

The instantaneous value of emf and current in an A.C. circuit are $$E=1.414$$sin( $$100\pi t-\frac{\pi }{4} $$) , $$ I=0.707$$ sin($$100\pi t$$) . The resistance of the circuit is