Transformers If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ? 62500 Ω 6250 Ω 250 Ω 25 Ω 62500 Ω 6250 Ω 250 Ω 25 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers The iron core is used to ______of the transformer. Reduce core loss None of the listed here Provide tight magnetic coupling Increase the wight Reduce core loss None of the listed here Provide tight magnetic coupling Increase the wight ANSWER DOWNLOAD EXAMIANS APP
Transformers In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be Ns s.N. (Ns-l)s (l-s)Ns Ns s.N. (Ns-l)s (l-s)Ns ANSWER DOWNLOAD EXAMIANS APP
Transformers Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is None of these less than one great than one approximately equal to one None of these less than one great than one approximately equal to one ANSWER DOWNLOAD EXAMIANS APP
Transformers The effect of leakage flux in a transformer is to ______ None of the listed here Increase copper losses Cause voltage drop in the windings Decreases copper losses None of the listed here Increase copper losses Cause voltage drop in the windings Decreases copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is 240 V 12 V 120 V 2,400 V 240 V 12 V 120 V 2,400 V ANSWER DOWNLOAD EXAMIANS APP
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