A step down transformer is used at 220 V to provide a current of 0.5 A to a 15 W bulb. If the secondary has 20 turns, find the number of turns in primary coil has current that flows in 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 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-up transformer is used on a 120V line to provide a potential difference of 240V, if the primary coil has 75 turns the number of turns in the secondary coil is ……..

A step down transformer increases the input current 4 A to 24 A at the secondary. If the number of turns in the primary coil is 330, the number of turns in the secondary coil is

A transformer is used to step up an alternating emf of 200V to 440V. If the primary coil has 1000 turns, calculate the number of turns in the secondary coil.