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Electric Current(I)

a What is an ...

Question

(a) What is an electric current? What makes an electric current flow in a wire?
(b) Define the unit of electric current (or Define ampere).

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Solution

a) An electric current is the flow of electrical charges. In conductors, it is the flow of electrons. Its the potential difference which makes electric current flow in a wire.
b) One ampere of current represents one coulomb of electrical charge moving past a cross-section in one second.

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