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.

A step-down transformer is used at 220 volt line to provided a current of 0.5 ampere to a 15 watt bulb. If the secondary has 20 turns, find the current and number of turns in the primary coil.

A step-up transformer operates on a 200 volt line and supplies a load of 2 ampere. The ratio of primary and secondary windings is 1:5. Determine the secondary voltge, primary current and power output. Assume efficiency to be 100%.

A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?

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 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?

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 nuber of turns in the secondary.

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

An ideal transformer has 5,000 turns on its primary coil . It is to be used to convert a mains supply of 230 V.to an alternating voltage having a peak value of 9.0 V. Calculate the number of turns on the secondary coil.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : In a transformer, the number of turns in the primary and secondary coils are 500 and 1,250 respectively. If the current in primary coil is 2 A, then the current in secondary coil will be 5 A. Reason : The current in secondary coil is given by I _ s = Ip xx (N_s)/(N_P)