Electrical Machines A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up

more than 220 V
6 V
somewhat less than 220 V
220 V

Electrical Machines The output indicate on the name plate of any motor is always the

Power drawn in KVA.
Power drawn in KW.
Output power at the shaft.
Gross power.

Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then

both hysteresis loss(Ph) and eddy current loss(Pe) will increase
Ph will decrease but Pe will remain same
Pe will increase but Ph will decrease
Ph will increase but Pe will decrease

60%
40%
68%
38%

Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be

Around 100 %.
Around 90 %
Less than 50 %
Any where between 75 % and 90 %.

Electrical Machines In the 3-phase induction motor, the resultant flux is of a constant nature and is

equal to φm, where φm is the maximum flux due to any phase
1/2 times maximum value of flux due to any phase
3/2 times maximum value of flux due to any phase
3 times maximum value of flux due to any phase