What is the SI unit of Electric Charge?

Options

A. Coulomb.
B. Ohm metre
C. Newton
D. Coulomb metre

Explanation

To determine the SI unit of electric charge, we can follow these steps:

### Step 1: Understand the Concept of Electric Charge
Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. Charges can be positive or negative, and they interact with each other through electric forces.

**Hint:** Recall that electric charge is a property of particles such as electrons and protons.

### Step 2: Identify the SI Units
The International System of Units (SI) provides a standardized set of units for measurement. Each physical quantity has a specific SI unit.

**Hint:** Think about the basic units of measurement in physics, such as length (meter), mass (kilogram), and time (second).

### Step 3: Review the Options Given
The question provides several options for the SI unit of electric charge:
1. Coulomb
2. Ohm meter
3. Newton
4. Coulomb meter

**Hint:** Consider which of these options is commonly associated with electric charge.

### Step 4: Recall the Definition of Coulomb
The Coulomb (symbol: C) is defined as the amount of electric charge transported by a constant current of one ampere in one second. It is named after Charles-Augustin de Coulomb, who formulated Coulomb's law, which describes the force between two charged objects.

**Hint:** Remember that the unit is named after a scientist and is related to the laws of electricity.

### Step 5: Conclude the Answer
Based on the understanding and definitions, the SI unit of electric charge is **Coulomb**.

**Final Answer:** The SI unit of electric charge is **Coulomb**.