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 typically consists of a coil of wire wound around a core material, which becomes magnetized when current flows through the wire.

Front

List some common applications of electromagnets.

Back

Electromagnets are used in various applications including electric motors, generators, magnetic locks, MRI machines, and loudspeakers.

Front

What materials are typically attracted to magnets?

Back

Materials that are typically attracted to magnets include ferromagnetic materials such as iron, nickel, and cobalt.

Front

What is the difference between permanent magnets and electromagnets?

Back

Permanent magnets maintain a constant magnetic field without the need for an electric current, while electromagnets require an electric current to generate a magnetic field.

Front

What is static electricity?

Back

Static electricity is the accumulation of electric charge on the surface of objects, which can result from friction, contact, or induction.

Front

What happens to objects with the same electric charge when they are brought close together?

Back

Objects with the same electric charge repel each other.

Front

What happens to objects with opposite electric charges when they are brought close together?

Back

Objects with opposite electric charges attract each other.

Front

What is the Van de Graaff generator used for?

Back

The Van de Graaff generator is used to generate high voltages and is often used in physics experiments to demonstrate static electricity and electric fields.

Front

What is the role of a magnetic field in the operation of an electric motor?

Back

In an electric motor, the magnetic field interacts with the electric current in the coils, producing a force that causes the motor to rotate.

Front

What is magnetic repulsion?

Back

Magnetic repulsion occurs when two like poles of magnets (north-north or south-south) are brought close together, causing them to push away from each other.