Question

define electric current.?

Answer 1

Answer:

An electric current is the rate of flow of electric charge past a point or region. An electric current is said to exist when there is a net flow of electric charge through a region. In electric circuits this charge is often carried by electrons moving through a wire.

Answer 2

$\Large\underline\mathfrak{Question}$

Define electric current.?

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$\Large\bold\star\underline{\underline\textbf{Electric current\:}}$

→ Electric current is defined as the time rate of flow of charge through any cross-section of a conductor.

»Electric Current ( I ), =
total charge flowing (q) / time taken (t)

»i.e. I = q / t


$\Large\bold\star\underline{\underline\textbf{Unit\:}}$

→ SI unit of electric current is ampere. It is denoted by A.

» 1 amphere = 1 coulomb / 1 second
= 1 Cs^-1

→ Therefore , the current through a wire is said to be 1 ampere if one coulomb of charge is flowing per second through a section of the wire.

$\Large\bold\star\underline{\underline\textbf{Direction\:}}$

→ The direction of flow of positive charge gives the direction of current. This is called conventional current. The direction of flow of electrons give the direction of electronic current. The direction of electronic current is opposite to that of conventional current.

$\Large\bold\star\underline{\underline\textbf{Scalar quantity\:}}$

→ Although , electric current represents the direction of flow of positive charge , yet it is a scalar quantity because for its addition, laws of vector addition are not applicable.

» i.e. the angle between the wires carrying current does not affect the total current in the circuit.









Hope it helped u.

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