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 Form 4 Physics: Electromagnetic induction online video lessons

Meaning of electromagnetic induction

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Answer Text:
-Electromagnetism is the effect resulting from the interaction between an electric current and a magnetic field. This effect brings about induced
electromagnetic force (e.m.f) and the resulting current is called induced current.
-Experiments on electromagnetic induction Consider the following diagram
- When the wire is moved up the galvanometer deflects in one direction then the opposite direction when moved downwards. When moved horizontally or held in a fixed position there is no deflection in the galvanometer. This shows that e.m.f is induced due to the relative motion of the wire or the magnet.