Electromagnetic Induction

In the previous entry, we have seen that current, I can produce magnetic field, B. In this entry, we are going to look the other way round where B can also produces I. This concept that we will discuss here is induction.

In 1831, Michael Faraday discovered that Power stations generate electricity by using electromagnetic induction.

Diagram 1

Diagram 1 will helps us to explain the meaning of electromagnetic induction.The wire is connected to a galvanometer. Do you still remember the function of galvanometer? Please have a think!!
What happens if we move the wire up and down in the region of the magnetic field? The galvanometer needle will flick to one side and another. It shows here that current is induced.

But, if the wire does not moved, there will be no induced current.

If there is an induced current, meaning there is also an induced voltage (or known as induced emf). Hence, we can conclude here that when a wire(conductor) is moving in a magnetic field, an emf is induced.

Thank you,
Mdm Ummi Atiah KMPk

~ May it Benefits You ➽💕

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