electromagnetic induction

Front

What is electromagnetic induction?

Back

Electromagnetic induction is the process by which a changing magnetic field within a coil of wire induces an electromotive force (EMF) or voltage in the wire.

Front

What is a generator?

Back

A generator is a device that converts mechanical energy into electrical energy using electromagnetic induction.

Front

What happens to the induced voltage if the number of coils in a wire increases?

Back

The induced voltage doubles when the number of coils doubles.

Front

What is the direction of induced current when a magnet is moved towards a coil?

Back

The direction of induced current is such that it opposes the change in magnetic flux, according to Lenz's Law.

Front

What is Lenz's Law?

Back

Lenz's Law states that the direction of induced current is always such that it opposes the change in magnetic flux that produced it.

Front

What is the role of a transformer?

Back

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction, typically used to increase or decrease voltage.

Front

What is the relationship between magnetic field strength and induced voltage?

Back

The induced voltage is directly proportional to the rate of change of the magnetic field strength.

Front

What is Faraday's Law of Electromagnetic Induction?

Back

Faraday's Law states that the induced EMF in a closed loop is equal to the negative rate of change of magnetic flux through the loop.

Front

What is the effect of moving a magnet quickly in and out of a coil?

Back

Moving a magnet quickly in and out of a coil increases the rate of change of magnetic flux, resulting in a higher induced voltage.

Front

What is the significance of the left side of a coil in terms of magnetic polarity?

Back

The left side of a coil can be designated as the north pole when current flows in a specific direction, based on the right-hand rule.