A step -down transformer converts a voltageof 2,200 V into 220 V in the transmission line. Number of turns in primary coil is 5,000. Efficiency of transformer is 90% and its output power is 8 kW. Calculate input power.

A step -down transformer converts a voltageof 2,200 V into 220 V in the transmission line. Number of turns in primary coil is 5,000. Efficiency of transformer is 90% and its output power is 8 kW. Calculate number of turns in secodnary coil.

Ratio of number of turns in primary and secondary coil of 440V-22000V step up transformer is

A step-down transformer is used to reduce 220V supply to 11V. The primary draws 5 A of current, while th secondary 90 A. The efficiency of the transformer is

In an ideal transformer, number of turns in primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, calculate output voltage

In an ideal transformer, number of turns in primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, calculate current in parimary.

Show diagramatically two different arrangements used for winding the primary and secondary coils in a transformer. Assuming the transformer to be an ideal one write expressions fo rthe ratio of its output current to input current in terms of the number of turns in the primary and secondary coils. Mention two reasons for energy losses in an actual transformer.

A transformer whose efficiency is 90%, draws 5 A when 200 V is applied to its primary coil. If output is drawn at 300 V, what is the current in secondary coil ? If number of turns in primary coil is 500, what is the number of turns in secondary coil?

A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the efficiency of the transformer is 80%, the current drawn by the primery winding of the transformer is