Alternating Cur...

When 100 volt dc is applied across a coil, a current of 1 amp flows through it. When 100 volt ac at 50 cycle s^–1 is applied to the same coil, only 0.5 ampere current flows. The impedance of the coil is

The coefficient of inductor of a choke coil is 0.1 H and resistance is 12 Ω. If it is connected to an alternating current source of frequency 60 Hz, then power factor will be

For series LCR circuit, wrong statement is

In a purely resistive ac circuit, the current

If an 8 Ω resistance and 6 Ω reactance are present in an ac series circuit, then the impedance of the circuit will be

A 12 ohm resistor and a 0.21 henry inductor are connected in series to an ac source operating at 20 volts, 50 cycle/second. The phase angle between the current and the source voltage is

What will be the phase difference between virtual voltage and virtual current, when the current in the circuit is wattless

In the non-resonant circuit, what will be the nature of the circuit for frequencies higher than the resonant frequency

A 220 V, 50 Hz ac source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?

The quality factor of LCR circuit having resistance (R) and inductance (L) at resonance frequency (ω) is given by