A step-down transformer is connected to main supply `200V` to operate a `6V`, 30W` bulb. The current in primary is

A step-down transfdormer connected to main supply of 220 V is made to operate 11 V, 88W lamp. Calculate (i) Transformation ration and (ii) Current in the primary.

A step down transformer, connected to mains supply 240V is made to operate a 12V 36W lamp. Assume 100% efficiency. Estimate current in the primary circuits.

A step down transformer connected to an ac mains supply of 220V is made to operate at 11V, 44W lamp. Ignoring power losses in the transformer what is the current in primary circuit.

A step down transformer is used to reduce the main supply of 200 V to 11 V. If the primary draws a current of 5 A and the secondary 90 A, what is the efficiency of the transformer ?

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?

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

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 24 V, 24 W, calculate the current in the primary coil of the circuit.