(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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Answer:
a)An electric current is the rate of flow of electric charge past a point or region. the presence of free electrons.
b)a unit of electric current equal to a flow of one coulomb per second.
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Explanation:
The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit Electric current is measured using a device called an ammeter
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