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प्रश्न
What do you understand by the term current? State and define its S.I. unit.
उत्तर
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 x 1018 electrons pass in 1 second across that cross-section of conductor.
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संबंधित प्रश्न
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Figure. below shows two conductors A and B. Their charges and potentials are given in diagram. State the direction of (i) flow of electrons and (ii) flow of current, when both the conductors are joined by a metal wire.
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Problems for practice:
If 50 coulomb of electric charge flows through a wire in five minutes, calculate the current in the wire?
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