Electromagnets and Generators

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 ferromagnetic core.

Front

What are the main components of an electromagnet?

Back

The main components of an electromagnet are a wire or solenoid, a ferromagnetic core (like iron), and a power source (battery).

Front

How can the strength of an electromagnet be increased?

Back

The strength of an electromagnet can be increased by adding more coils of wire around the core or increasing the electric current.

Front

What happens when like poles of magnets are brought together?

Back

Like poles of magnets repel each other.

Front

What is the role of magnets in generators?

Back

In generators, magnets rotate inside a coil of wire to produce an electric current through electromagnetic induction.

Front

What is electromagnetic induction?

Back

Electromagnetic induction is the process of generating electric current in a conductor by changing the magnetic field around it.

Front

What is a galvanometer?

Back

A galvanometer is an instrument used to detect and measure electric current.

Front

What is the effect of moving a magnet near a coil of wire?

Back

Moving a magnet near a coil of wire induces an electric current in the wire.

Front

What is a solenoid?

Back

A solenoid is a coil of wire that generates a magnetic field when an electric current passes through it.

Front

What is the difference between an electromagnet and a permanent magnet?

Back

An electromagnet's magnetic field is created by electric current and can be turned on or off, while a permanent magnet produces a constant magnetic field.