Question

Define electric current. State its practical unit and define it.

Answer 1

Step 1: Electric current:

1. The current is the rate at which charge flows in an electrical circuit.
2. The letter indicates the current is $I$.

Step 2: The practical unit of electric current:

$Ampere$ is the SI unit for measuring current, that's the rate of flow $1coulomb$ of a charge through the circuit in one second.

Step 3: $Ampere$:

1. The current flowing through a circuit is called an $ampere$ when a $coulomb$ charge passes through it in one second.
2. $1ampere=\frac{1coulomb}{1second}$