Transformers

A transformer is used to increase or decrease:

the voltage in a circuit

Alternating current flowing in wires wrapped around an iron core:

Magnetizes the core, and in turn produces a changing magnetic field in the core

This changing magnetic field generates:

A neighboring coil of wire

Depending on the number of turns of the wire:

The primary versus the secondary coil, and the proximity of the coils, a smaller or larger voltage can be induced in the secondary coil

The primary coil is the one:

That is connected to the source

The secondary coil is the one in which:

An electric current is induced

A larger number of secondary coils means:

A larger voltage

The closer the secondary coils are to the primary coils:

The more efficient the transformers is in producing a voltage in the secondary coils

Transformers are especially useful to:

Transmit electricity from power plants to residences and businesses

It is more energy efficient to:

Transmit low current, high voltage electricity

By the time the transformers arrive at home:

It must be reduced or “stepped down” to the standard 120-240 volts that most appliances in our home use