G11 Experience 3

An electric generator converts mechanical energy into electrical energy.

• True

• False

An Electric circuit occurs when an electrical conductor is in a changing magnetic field.

• True

• False

A transformer’s input voltage depends on the input voltage and the ratio of the number of primary coils to secondary coils.

• True

• False

Answer explanation

Transformer's output

A ____________has fewer secondary coils than primary coils, and its output is at a lower voltage.

• Step up transformer

• Step down transformer

• Ac transformer

Answer explanation

Fewer secondary coils provide less output

Back EMF is a potential that acts against the voltage driving the motor.

• True

• False

A transformer is an electrical device that increases or decreases voltage by means of sets of wire coils wrapped around a shared iron core

• Generator

• Motor

• Transformer