What is magnetic induction?

Magnetic induction is used to describe the properties of a magnetic field. It is a physical quantity that expresses the effect of a magnetic field on a current-carrying conductor. Magnetic induction is a vector quantity because it has both magnitude and direction.

Samarium cylinder magnet dia. 3×2

Compact, powerful magnet suitable for experiments, magnetic field demonstrations and technical applications.

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Samarium prism magnet 10×8×5

Powerful magnet suitable for demonstrating magnetic force and for other technical applications.

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Ferrite cylinder magnet dia. 20×10

Practical cylindrical ferrite magnet suitable for experiments, demonstrations and general technical magnetic applications.

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Electromagnetic induction

Electromagnetic induction is the phenomenon in which a changing magnetic field induces an electromotive force, and potentially an electric current, in a conductor.

It was discovered by Michael Faraday in 1831. Faraday's law of induction was later expressed mathematically within Maxwell's equations. Electromagnetic induction is a fundamental scientific phenomenon and an essential topic in physics.

This phenomenon has many applications in the modern world:

• Seismographs
• Electric guitar pickups
• Electric generators
• Electric motors
• Hybrid cars
• Dynamos

What is the difference between magnetic induction and electromagnetic induction?

Magnetic induction is a physical quantity, whereas electromagnetic induction is a physical phenomenon.

When the magnetic field around a closed circuit containing a coil changes, an induced voltage is generated and an electric current can flow in the closed circuit. For example, moving a magnet relative to a conductor can produce an induced electric current. This phenomenon is known as electromagnetic induction.

Unit of magnetic induction

Magnetic induction is denoted by B and its SI unit is the tesla (T).

Faraday's equation for induced voltage: e = N(dΦ/dt)