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Electromotive Force is often mentioned in Battery (I don't know how it works in battery), but I want to know how it works in electric generator....

I can't find any explanation that that makes me clearly understand it.

How magnetic Induction Works? <-- "When the magnetic flux through the wire changes, as it moves down, Faraday's law of induction says that it acquires an electromotive force."

"The "electromotive force" will now cause a current to flow in the external resistor R. This means that a similar current (electron flow) flows through the rod PQ itself, giving a magnetic force to the left."

So electromotive force is the main thing that makes electrons move (electric current) in one direction?

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I can't find any explanation that that makes me clearly understand it.

An electromotive force means a voltage across two points which can do work, like the electrical outlet in your home, or a battery.

So electromotive force is the main thing that makes electrons move (electric current) in one direction?

Yes, a voltage between two points makes current flow in a conductor connected to the two points.

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