Transformers are used to change ____ to meet requirements for specific equipment.

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Multiple Choice

Transformers are used to change ____ to meet requirements for specific equipment.

Transformers are used to adjust the voltage level of alternating current to meet the requirements of different equipment. They work by electromagnetic induction between windings on a shared magnetic core, and this relies on a changing magnetic field produced by AC. With DC, once any initial surge passes, the flux becomes constant and no further induction occurs, so a transformer can’t change DC voltages. They don’t directly change resistance, and the current they deliver is determined by the load and the voltage change (power in roughly equals power out, minus losses), so stepping voltage up lowers current while stepping it down raises current. So the device is used to meet equipment voltage requirements by changing AC voltages.

Transformers are used to adjust the voltage level of alternating current to meet the requirements of different equipment. They work by electromagnetic induction between windings on a shared magnetic core, and this relies on a changing magnetic field produced by AC. With DC, once any initial surge passes, the flux becomes constant and no further induction occurs, so a transformer can’t change DC voltages. They don’t directly change resistance, and the current they deliver is determined by the load and the voltage change (power in roughly equals power out, minus losses), so stepping voltage up lowers current while stepping it down raises current. So the device is used to meet equipment voltage requirements by changing AC voltages.

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