Magnetism and Electromagnetism

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What are magnetic field lines?

Back

Magnetic field lines are imaginary lines that represent the direction and strength of a magnetic field. They spread out from one pole of a magnet and curve around to the other pole.

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What happens when an electric current passes through a wire?

Back

An electric current passing through a wire produces a magnetic field around the wire.

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What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It can be turned on and off.

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What is the principle of electromagnetic induction?

Back

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

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Front

What device is used to increase or decrease voltage?

Back

Transformers are devices that can increase or decrease voltage in an electrical circuit.

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What is the relationship between electricity and magnetism?

Back

Electricity and magnetism are interrelated; electric currents produce magnetic fields, and changing magnetic fields can induce electric currents.

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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.

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Front

What occurs when a magnet is moved through a coil of wire?

Back

Moving a magnet through a coil of wire generates an electric current in the wire.

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Front

What is a permanent magnet?

Back

A permanent magnet is a material that maintains a persistent magnetic field without the need for an external power source.

Front

What is the role of a galvanometer?

Back

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

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