Questions in Alternating Current

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	An inductor of inductance $L$ and resistor of resistance $R$ are joined in series and connected by a source of frequency $\omega $. Power dissipated in the circuit is
	In a ac circuit of capacitance the current from potential is
	A coil of $200 \Omega$ resistance and $1.0 H$ inductance is connected to an ac source of frequency $200/2\pi \,Hz.$ Phase angle between potential and current will be
	In a LCR circuit the pd between the terminals of the inductance is $60$ V, between the terminals of the capacitor is $30$ V and that between the terminals of resistance is $40$ V. the supply voltage will be equal to
	Radio frequency choke uses core of
	In a LCR circuit capacitance is changed from $C$ to $2C$. For the resonant frequency to remain unchanged, the inductance should be change from $L$ to
	In an LCR series ac circuit, the voltage across each of the components, $L$, $C$ and $R$ is $50$ V. the voltage across the LC combination will be
	A coil has $L = 0.04 H$ and $R = 12\,\Omega $. When it is connected to $220V$, $50H$z supply the current flowing through the coil, in amperes is
	The current in series LCR circuit will be maximum when $\omega$ is
	An inductor $L$ and a capacitor $C$ are connected in the circuit as shown in the figure. The frequency of the power supply is equal to the resonant frequency of the circuit. Which ammeter will read zero ampere