SSC JE Electrical Engineering 2011

If in an R-L-C series circuit the current lags the applied voltage by $$60^\circ$$ then

A lossy capacitor with loss angle of 0.01 radian, draws a current of 0.5 A when supplied at 1000 V from a sinusoidal voltage source. The active power consumed by the capacitor is

An AC voltage source with an internal impedance $$Z_{1}$$ is connected to a load of impedance $$Z_{2}$$ . For maximum power transfer to the load, the condition is

The resonant frequency of the AC series circuit shown in figure given below, in Hz is

A current wave starts at zero, rises instantaneously, then remains at a value of 20 A for 10 sec, then decreases instantaneously, remaining at a value of -10 A for 20 sec, and then repeats this cycle. The rms value of the wave is

Two incandescent bulbs of rating 230 V, 100 W and 230 V, 500 W are connected in parallel across the mains. As a result what will happen?

In two wattmeter method of measurment of threephase power of a balanced load, if both the wattmeters indicate the same reading, then the power factor of the load is

Measurement of ________ is affected by the presence of thermo-emf in the measuring circuit

The response time of an indicating instrument is determined by its

The ratio of the reading of two wattmeters connected to measure active power in a balanced 3-phase load is 2 : 1. The power factor of the load is