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Current Electricity — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSCurrent Electricity2 Marks
Question
What do you understand by the term current? State and define its S.I. unit.
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Answer

Current is the rate of flow of charge across a cross-section. It is a scalar quantity.
Its S.I. unit is ampere (coulomb per second).
If 1 ampere current flows through a conductor, it means that $6.25 \times 10^{18}$ electrons pass in 1 second across that crosssection of conductor.

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