Transformers The hum in a transformer is mainly attributed to oil in the transformer mechanical vibrations load changes magnetostriction oil in the transformer mechanical vibrations load changes magnetostriction ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be fluctuating load mechanical vibrations poor insulation saturation of core fluctuating load mechanical vibrations poor insulation saturation of core ANSWER DOWNLOAD EXAMIANS APP
Transformers A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is 0 V 1 V 0.85 V 1.7 V 0 V 1 V 0.85 V 1.7 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Air is not a good magnetic insulator Iron core has high permeability Transformer is not an efficient device Applied voltage is sinusoidal Air is not a good magnetic insulator Iron core has high permeability Transformer is not an efficient device Applied voltage is sinusoidal ANSWER DOWNLOAD EXAMIANS APP
Transformers In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is one-fourth the primary current equal to the primary current one-fourth the primary current and equal to the primary current four times the primary current one-fourth the primary current equal to the primary current one-fourth the primary current and equal to the primary current four times the primary current ANSWER DOWNLOAD EXAMIANS APP
Transformers How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V? 900 V 90 V 9 V 0.9 V 900 V 90 V 9 V 0.9 V ANSWER DOWNLOAD EXAMIANS APP
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