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 Oscillates around the rated speed. Increases. Remains unchanged. Decreases. Oscillates around the rated speed. Increases. Remains unchanged. Decreases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Scott connections are used for any of the above. single phase to three phase transformation. three phase to single phase transformation. three phase to two phase transformation. any of the above. single phase to three phase transformation. three phase to single phase transformation. three phase to two phase transformation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer oil is used as inert medium. an insulator. both A and B. a coolant. inert medium. an insulator. both A and B. a coolant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 50 Hz. 16.67 Hz. 60 Hz. 25 Hz. 50 Hz. 16.67 Hz. 60 Hz. 25 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss is proportional to f. f1.5. f2. f3. f. f1.5. f2. f3. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. is in the same direction as the main poles. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. makes an angle with the main pole axis which is load dependent. is in the same direction as the main poles. makes an angle of 90° with the main pole axis. ANSWER DOWNLOAD EXAMIANS APP
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