Electromagnets, electric motors & transformers

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core of ferromagnetic material.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Front

Which appliances typically use electromagnets?

Back

Appliances like telephones, televisions, and radios use electromagnets, while a broom does not.

Tags

NGSS.HS-PS2-5

Front

What is the main function of a transformer?

Back

A transformer is used to change the voltage of an electric current, either increasing (step-up transformer) or decreasing (step-down transformer) it.

Tags

NGSS.HS-PS3-3

Front

What is the difference between a high-voltage transformer and a low-voltage transformer?

Back

A high-voltage transformer has more insulation between the layers of windings than a low-voltage transformer.

Front

What happens to a charge moving at right angles in a magnetic field?

Back

The charge moves in a circular path.

Front

What do unlike magnetic poles do?

Back

Unlike magnetic poles attract each other.

Tags

NGSS.HS-PS3-5

Front

What do like magnetic poles do?

Back

Like magnetic poles repel each other.

Tags

NGSS.HS-PS3-5

Front

What is the relationship between primary and secondary voltage in a transformer?

Back

The ratio of the secondary voltage to the primary voltage is equal to the ratio of the secondary turns to the primary turns.

Front

What is the role of the core in a transformer?

Back

The core in a transformer helps to channel the magnetic field and improve the efficiency of the voltage transformation.

Tags

NGSS.HS-PS2-5

Front

What is a simple electric motor?

Back

A simple electric motor converts electrical energy into mechanical energy using electromagnets.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3