Questions in Alternating Current

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An ac circuit consists of an inductor of inductance $0.5 H$ and a capacitor of capacitance $8 \mu F$ in series. The current in the circuit is maximum when the angular frequency of ac source is
The average power dissipation in a pure capacitance in ac circuit is
In a region of uniform magnetic induction $B = {10^{ - 2}}\,tesla$, a circular coil of radius $30 cm$ and resistance $\pi ^2$ ohm is rotated about an axis which is perpendicular to the direction of $B$ and which forms a diameter of the coil. If the coil rotates at $200 rpm$ the amplitude of the alternating current induced in the coil is
An inductive circuit contains a resistance of $10$ ohm and an inductance of $2.0$ henry. If an ac voltage of $120$ volt and frequency of $60$ Hz is applied to this circuit, the current in the circuit would be nearly
In a LCR circuit having $L = 8.0 henry$, $C = 0.5 \mu F$ and $R = 100 ohm$ in series. The resonance frequency in per second is
In LCR circuit, the capacitance is changed from $C$ to $4C$. For the same resonant frequency, the inductance should be changed from $L to
A $120$ volt ac source is connected across a pure inductor of inductance $0.70$ henry. If the frequency of the source is $60$ Hz, the current passing through the inductor is
The impedance of a circuit consists of $3 ohm$ resistance and $4 ohm$ reactance. The power factor of the circuit is
$L$, $C$ and $R$ denote inductance, capacitance and resistance respectively. Pick out the combination which does not have the dimensions of frequency
The power factor of a good choke coil is

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