Electromagnets

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 material, that becomes magnetized when electricity flows through it.

Front

What is a good insulator?

Back

A good insulator is a material that does not allow electricity to flow through it easily. An example of a good insulator is rubber.

Front

What is a closed circuit?

Back

A closed circuit is a complete conducting loop that allows electricity to flow continuously without interruption.

Front

What happens when the lights are on in a circuit?

Back

When the lights are on, the circuit is closed, meaning that electricity is flowing through the circuit.

Front

What is magnetization?

Back

Magnetization is the process by which a material becomes a magnet. This can happen temporarily or permanently depending on the material and the method used.

Front

What is a temporary magnet?

Back

A temporary magnet is an object that becomes magnetized when exposed to a magnetic field but loses its magnetism when the field is removed.

Front

What is a permanent magnet?

Back

A permanent magnet is a material that maintains its magnetic properties over time without the need for an external magnetic field.

Front

What is the role of a core in an electromagnet?

Back

The core of an electromagnet, often made of iron, enhances the magnetic field created by the electric current flowing through the coil.

Front

What is the relationship between electricity and magnetism?

Back

Electricity and magnetism are closely related; an electric current can create a magnetic field, and a changing magnetic field can induce an electric current.

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. It is expressed as V = I x R.