Alternating Cur...

In ac circuit of capacitance the current from potential is

A coil of 200 Ω resistance and 1.0 H inductance is connected to an ac source of frequency 200 /2π Hz. Phase angle between potential and current will be

Radio frequency choke uses core of

The current in series LCR circuit will be maximum when ω is

In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45°. The value of C is

In an ac circuit the current

In a choke coil, the reactance X_L and resistance R are such that

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillation of frequency f. If L is doubled and C is changed to 4C, the frequency will be

A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series with a condenser of capacitative reactance 25 Ω. The combination is connected to an ac source of 110 volt. The power factorof the circuit is

In an LCR series resonant circuit which one of the following cannot be the expression for the Q–factor