Question

Write the mathematical expression for current. What is its SI unit?

Answer 1

Concept used: Electric current

Prerequisite: Knowledge of current

Step 1: The current can be defined as the amount of charge (positive or negative) flowing in a conductor in unit time. The mathematical expression for the current flows in an electric circuit is given by the Ohms law.

The mathematical expression for the current in terms of voltage, and resistance is given by,

$I=\frac{V}{R}$

Here, V is the voltage, and R is the resistance.

Step 2: The SI unit of current is Ampere, and it is denoted by the letter A.