PS Ch 7 Test

Front

What type of electric current creates a changing magnetic field?

Back

Alternating current.

Front

What does a magnetic field exert a force on?

Back

Magnetic materials.

Front

In what device is electrical energy transformed into mechanical energy?

Back

Electric motor.

Front

What is the winding of wire around a core connected to a source of energy called?

Back

Primary coil.

Front

What is an incomplete electrical circuit in which no electricity flows called?

Back

Open Circuit.

Front

What type of electric current flows in one direction?

Back

Direct current.

Front

What is the term for the region around a magnet where magnetic forces can be detected?

Back

Magnetic field.

Front

What device uses electromagnetic induction to convert electrical energy to mechanical energy?

Back

Electric motor.

Front

What is the purpose of a transformer?

Back

To change the voltage of an alternating current.

Front

What is the difference between a closed circuit and an open circuit?

Back

A closed circuit allows electricity to flow, while an open circuit does not.