Transformers In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be (l-s)Ns (Ns-l)s Ns s.N. (l-s)Ns (Ns-l)s Ns s.N. ANSWER DOWNLOAD EXAMIANS APP
Transformers Sumpner's test is conducted on transformers to determine stray losses temperature None of these all-day efficiency stray losses temperature None of these all-day efficiency ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 98 per cent 25 per cent 50 per cent 100 per cent 98 per cent 25 per cent 50 per cent 100 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns? 450 350 210 900 450 350 210 900 ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Air is not a good magnetic insulator Transformer is not an efficient device Iron core has high permeability Applied voltage is sinusoidal Air is not a good magnetic insulator Transformer is not an efficient device Iron core has high permeability Applied voltage is sinusoidal ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of less than 15 A 15 A None of these more than 15 A less than 15 A 15 A None of these more than 15 A ANSWER DOWNLOAD EXAMIANS APP
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