Transformers In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is 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 one-fourth the primary current ANSWER DOWNLOAD EXAMIANS APP
Transformers No-load on a transformer is carried out to determine magnetising current copper loss magnetising current and loss efficiency of the transformer magnetising current copper loss magnetising current and loss efficiency of the transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. 3-5% Above 40% 15-30% 30-40% 3-5% Above 40% 15-30% 30-40% ANSWER DOWNLOAD EXAMIANS APP
Transformers The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is 20 A 15 A 10 A 5 A 20 A 15 A 10 A 5 A ANSWER DOWNLOAD EXAMIANS APP
Transformers Efficiency of a power transformer is of the order of 50 per cent 25 per cent 100 per cent 98 per cent 50 per cent 25 per cent 100 per cent 98 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers The hum in a transformer is mainly attributed to magnetostriction mechanical vibrations oil in the transformer load changes magnetostriction mechanical vibrations oil in the transformer load changes ANSWER DOWNLOAD EXAMIANS APP
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