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 The noise produced by a transformer is termed as buzz ringing zoom hum buzz ringing zoom hum ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Hysteresis loss is decreased Eddy current is increased Magnetising current is greatly increased Reluctance of magnetic path is decreased Hysteresis loss is decreased Eddy current is increased Magnetising current is greatly increased Reluctance of magnetic path is decreased ANSWER DOWNLOAD EXAMIANS APP
Transformers The amount of copper in the primary is _______that of secondary. Smaller than Greater than None of the listed here About the same as Smaller than Greater than None of the listed here About the same as ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers upto a rating of 500 kVA 1000 kVA 3000 kVA 250 kVA 500 kVA 1000 kVA 3000 kVA 250 kVA 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 more than 15 A 15 A None of these less than 15 A more than 15 A 15 A None of these less than 15 A ANSWER DOWNLOAD EXAMIANS APP
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