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 6 V somewhat less than 220 V more than 220 V 220 V 6 V somewhat less than 220 V more than 220 V 220 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field divertor resistance for a DC series motor is of order of 0.1 Ω 10 Ω 50 Ω 100 Ω 0.1 Ω 10 Ω 50 Ω 100 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate and the speed falls. deteriorate and the speed rises. improve and the speed falls. improve and the speed rises. deteriorate and the speed falls. deteriorate and the speed rises. improve and the speed falls. improve and the speed rises. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 36 W. 30 W. 28 W. 25 W. 36 W. 30 W. 28 W. 25 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 1500 rpm. 3000 rpm. 3600 rpm. 4000 rpm. 1500 rpm. 3000 rpm. 3600 rpm. 4000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Armature resistance. Residual magnetism of the generator. None of above. Field resistance. Armature resistance. Residual magnetism of the generator. None of above. Field resistance. ANSWER DOWNLOAD EXAMIANS APP
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