Transformers A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is 78 Ω 7.8 Ω 1.3 Ω 13 Ω 78 Ω 7.8 Ω 1.3 Ω 13 Ω ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is 5 25 0.2 0.4 5 25 0.2 0.4 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 None of these more than 15 A 15 A less than 15 A None of these more than 15 A 15 A less than 15 A ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Air is not a good magnetic insulator Iron core has high permeability Applied voltage is sinusoidal Transformer is not an efficient device Air is not a good magnetic insulator Iron core has high permeability Applied voltage is sinusoidal Transformer is not an efficient device ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling Uses capacitive coupling Uses electric coupling Is a static device Uses inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum efficiency of a distribution transformer is at 80% full load at 50% full load at full load at no load at 80% full load at 50% full load at full load at no load ANSWER DOWNLOAD EXAMIANS APP
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