A delta connected load has the per phase impedance 8.66+j5. If the load is connected across 100 volt balanced 3-phase supply, the line current is

A wattmeter reads 300 W when its current coil is connected in the R phase and its pressure coil is connected between this phase and the neutral of a symmetrical 3-phase system supplying a balanced star connected 0.707 P.f. inductive load. The phase sequence is RYB. What will be the reading of this wattmeter if its pressure coil alone is reconnected between the B and Y phases, all other connections remaining as before?

A series circuit having R= 20 ohms, L=0.1H and C=50 microfarads are connected across 200V, 50Hz supply. The active power of the circuit is_______

A resistance of 10 ohm and a pure coil of inductance 31.8 mH are connected in parallel across 200V, 50Hz supply. The total current supplied by the source is_________A

In an AC circuit, resistance 50 Ω, inductance 0.3 H and capacitance 15 μF is connected to an AC voltage source 25 V, 50 Hz. The phase difference between current and voltage is ______°

A coil having R= 2 Ω and inductance L is connected in parallel with a capacitor of capacitance 714 μF to 250 V 50-Hz supply. The Current at resonance 35.9 A . Then the inductance of a coil is

A complex voltage wave is applied across a pure capacitor. As compared to the fundamental voltage, the reactance offered by the capacitor to the third harmonic voltage would be

While measuring power of a three-phase balanced load by the two-wattmeter method, the readings are 255 W and 85 W. The power factor of the load is 

In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor

A coil of resistance 20 Ω and inductance 200 μH is in parallel with a variable capacitor. This combination is in series with a resistor of 8000 Ω. The voltage of the supply is 200 V at a frequency of 106 Hz. The capacitance of capacitor and Q of the coils