Electrical Machines The starting resistance of DC motor is generally around 500 ohms. 1000 ohms. Low. Infinitely large. around 500 ohms. 1000 ohms. Low. Infinitely large. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Motors for fans and pumps are selected in the rpm range 375 to 500. 720 to 920. 1440 to 2880. 500 to 720. 375 to 500. 720 to 920. 1440 to 2880. 500 to 720. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The flux involved in the emf equation of a transformer has average value. total value. maximum value. rms value. average value. total value. maximum value. rms value. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 2 KVA transformer has iron loss of 150 W and full load copper loss of 250 W. The maximum efficiency of the transformer would occur when the total loss is 500 W 400W 250 W 300 W 500 W 400W 250 W 300 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 1, 4 2, 3 1, 3 2, 4 1, 4 2, 3 1, 3 2, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In alternator, the rotary part is core. armature. magnetic field poles. none of these. core. armature. magnetic field poles. none of these. ANSWER DOWNLOAD EXAMIANS APP
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