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It is more efficient to transmit power over long distances at high voltages.
It is more efficient to transmit power over long distances at high voltages. However since we don't want such high voltage in your house, a transformer must be used to reduce the voltage before it enters the home.
Consider an ideal transformer has a primary coil of 380 turns and a secondary coil of 24 turns. Its primary coil is connected to a high voltage wire of 2400 V (AC).
If the secondary coil provides a current of 3.32 A to a hairdryer in the house, what current does the primary coil draw from the high voltage line?