Transformers Efficiency of a power transformer is of the order of 50 per cent 100 per cent 25 per cent 98 per cent 50 per cent 100 per cent 25 per cent 98 per cent ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 . What is the approximate voltage across the load? 73 V 880 V 88 V 7.3 V 73 V 880 V 88 V 7.3 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers upto a rating of 1000 kVA 250 kVA 500 kVA 3000 kVA 1000 kVA 250 kVA 500 kVA 3000 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers The transformer that should never the secondary open circuited when primary is energised is _______ Current transformer Power transformer Auto transformer Voltage transformer Current transformer Power transformer Auto transformer Voltage transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The eddy current loss in a transformer is directly proportional to _______. The flux density in the core The supply frequency Thickness of core lamination Square of thickness of core lamination The flux density in the core The supply frequency Thickness of core lamination Square of thickness of core lamination 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 12 V 240 V 2,400 V 120 V 12 V 240 V 2,400 V 120 V ANSWER DOWNLOAD EXAMIANS APP
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