Electrical Machines A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor Remains unchanged. Oscillates around the rated speed. Decreases. Increases. Remains unchanged. Oscillates around the rated speed. Decreases. Increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is 230 V not possible some what more than 230 V some what less than 230 V 230 V not possible some what more than 230 V some what less than 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is demagnetising. magnetising. crossmagnetising. none of above. demagnetising. magnetising. crossmagnetising. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commonly used starters of cage motor is DOL. both A and B. star delta. None of these DOL. both A and B. star delta. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing input power of the prime mover. increasing terminal voltage. increasing armature cooling. increasing armature resistance. increasing input power of the prime mover. increasing terminal voltage. increasing armature cooling. increasing armature resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 7%. 0%. 14%. 8.9%. 7%. 0%. 14%. 8.9%. ANSWER DOWNLOAD EXAMIANS APP
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