A step down transformer converts a voltage of 2200 V into 220V in the transmission line. Number of turns in primary coil is 5000. Efficiency of the transformer is 90% and its output power is 8 kW. Calculate the
input power.

A step down transformer converts a voltage of 2200 V into 220V in the transmission line. Number of turns in primary coil is 5000. Efficiency of the transformer is 90% and its output power is 8 kW. Calculate the number of turns in the secondary coil.

A transformer decreases the alternating supply voltage from 2200 V to 220 V. If the number of turns in the primary coil of the transformer is 2000, calculate the number of turns in secondary.

A step down transformer works on 220 volts a.c. mains. It is used to light at 100W, 20V bulb. The main current is 0.5A. What is the efficiency of the transformer?

In a step up transformer, the input voltage is 300 V and the output voltage is 15 kV. Then the ratio of the number of turns in the primary to that in the secondary is

In a step up transformer , the transformation ratio is 100. The primary voltage is 200V and input power is 1000 watt.The number of turns in the primary is 100. Calculate the current in the primary

In a transformer the number of turns in primary and secondary are 500, 2500 turns, respectively. If the power input to primary is 80 xx 10^-3 W at 240 V, calculate output voltage.

A transformer is used to reduce the main supply of 220 V to11 V. If the current in the primary and secondary coils are 5A and 90 A respectively, the efficiency of transformer is

In a step up transformer , the transformation ratio is 100. The primary voltage is 200V and input power is 1000 watt.The number of turns in the primary is 100. Calculate the number of turns in secondary

In a step up transformer , the transformation ratio is 100. The primary voltage is 200V and input power is 1000 watt.The number of turns in the primary is 100. Calculate the voltage across the secondary

The number of turns in primary and secondary coil of transformer are 1000 to 5000 and 90 V ac is applied to primary, hence the voltage at the secondary is