In England, standard household voltage is 240 volts. If you brought your own

hair dryer on a trip there, you would need a transformer to step down the voltage

before you plug in the appliance. If the transformer steps down voltage from 240

to 120 volts, and the primary coil has 50 turns, how many turns does the

secondary coil have?

Question

Houston Rosales

Physics

6 April, 14:14

In England, standard household voltage is 240 volts. If you brought your own

hair dryer on a trip there, you would need a transformer to step down the voltage

before you plug in the appliance. If the transformer steps down voltage from 240

to 120 volts, and the primary coil has 50 turns, how many turns does the

secondary coil have?

+1

Answers (1)

Know the Answer?

Salma Hill · Answer 1

The voltage transformation is in direct proportion to the ratio of the turns in each winding. To transform 240 volts to 120, the secondary needs 25 turns.