A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil?

A transformer has 200 windings in the primary and 400 windings in the secondary. The primary is connected to an a.c. supply of 110 V and a current of 10 A flows in it The voltage across the secondary and the current in its respectively are

An a.c. voltage of 200 V is applied to the primary of a transformer and voltage of 2,000 V is obtained form the secondary. Calculate the ratio of the currents through the primary and secondary coils.

Efficiency of a transformer is 80% and primary and secondary coils hae 30 and 120 turns respectively. Current in the secondary coil is 0.25 A. Find out the current in primary coil.

The output voltage of an ideal transformer, connected to a 240 V a.c mains, is 24 V. When this transformer is used to light a bulb with rating 24V - 24W, calculate the current in the primary coil of the circuit.

The primary coil of an ideal stepup transformer has 100 turns and the transformer ratio is also 100. The input voltage and power are 220 V and 1100 W. Calculate the current in the primary

When a voltage of 120 V is impressed across the primary of a transformer, the current in the primary is 1.85 mA. Find the voltage across the secondary, when it delivers 150 mA. The transformer has an efficiency of 95 %.

Calculate the current drawn by the primary windlings of a step-down transformer, whose primary and secondary voltages are 220V and 22V rspectively. A load resistance of 22 ohm is connected to its secondary windings and it operates at an efficiency of 75%.

A step up transformer is used on a 120 volt line to provide a potential difference of 2,400 volt at 2 ampere current . If primary has 1,000 turns, find the number of turns in secondary and current in the primary coil.