A balanced 3 phase star connected load of 12800W takes a leading current of 23 A when connected across a 3 phase, 400 V, 50 Hz supply. The resistance per phase is

A resistor and a capacitor are connected in series with a variable inductor. When the circuit is connected to a 240-V, 50-Hz supply, the maximum current given by varying the inductance is 0.5A. At this current, the voltage across the capacitor is 250 V. The values of inductance and resistance are

A current of 5 A flows through a non-inductive resistance in series with a choking coil when supplied at 250 V, 50 Hz. If the voltage across the non-inductive resistance is 125 V and the voltage across the coil 200 V, The resistance of the coil would be

An alternating current of 50 Hz frequency has a maximum value of 100A. Its value 1/600 second after the instant the current is zero will be

A series RLC circuit has a resonance frequency of 1 kHz and a quality factor Q=100. If each R, L and C is doubled from its original value, the new Q of the circuit is

A parallel resonant circuit draws a current of 2 mA at resonance. if Q=100. The current drawn by capacitor is

A circuit connected to a 115V, 50 Hz supply takes 0.8A at a power factor of 0.3 lagging. The values of resistance and inductance of the circuit if they are connected in parallel is ______ohm and _______Henry respectively

A voltage V = 150 + j180 is applied across an impedance and the current flowing is found to be I = 5 − j4. The power consumed in this circuit is

An alternating voltage of 100 sin 314t is applied to a halfwave rectifier which is in series with a resistance of 25 Ω. If the resistance of the rectifier is infinite in one direction and zero in the other, the r.m.s. value of the current drawn from the supply source.

A coil is in series with a 20μF capacitor across a 230-V, 50-Hz supply. The current taken by the circuit is 8 A and the power consumed is 200 W. The inductance of the coil is