List of top Electrical Engineering Questions asked in TS PGECET

Speed of a 3-\(\phi\), 4-pole, 60 Hz induction motor at 75% of full-load is 1700 rpm. The speed at full-load can be

The disadvantage of Hopkinson's test on two dc shunt machines is

When load current of a dc series motor is increased, then

Slope of the tangent drawn on initial portion of O.C.C of synchronous generator is

If the locus of minimum armature currents of V-curves of synchronous motor is a straight line, then the slope of the line is

If \( \delta \) is load angle, the real power of 3-\(\phi\) synchronous motor is

To control voltage of a long shunt dc compound generator, a diverter resistance is connected across

A DC generator with 8-pole, 480 armature conductors, wave winding, draws an armature current of 200 A. When brushes are shifted by \( 6^\circ \) electrical from GNP, the cross-magnetising amp-turn/pole is

In a wave winding, if \( y_b \) and \( y_c \) are back and commutator pitches respectively, then the front pitch \( y_f \) is given by

A transformer has full load copper loss of 400 W. The copper loss at half full load will be

The load current of a step down 250/200 V auto-transformer is 100 A. The conductive and inductive powers transformed are

The eddy current loss and hysteresis loss of 1-\(\phi\), 100 kVA, 50 Hz transformer are 4 kW and 6 kW respectively. If frequency is increased by 10%, then total loss is

The copper and iron losses of a 1-$\phi$ transformer are equal at 90% of full load and its value is 162 W. The total loss at 80% of full load is

In an ideal transformer, which of the following is correct?

In delta-star connection, the phase displacement between the primary voltage and secondary emfs is

Internal resistance of ideal current source is

In a two wattmeter method, if one wattmeter reads negative then

Form factor of a sine wave is

The efficiency of a circuit at maximum power transfer condition is

Thevenin equivalent of a circuit consists of

Choose the correct statement

At resonance, power factor in a parallel RLC circuit is

The varying electric fields are a source of

Phasor analysis is valid for

If all resistances in delta are equal to 30 $\Omega$, then each resistance in star is