The scalar quantity among the following is

Options

A. weight of body
B. temperature gradient
C. TENSION
D. ELECTRIC POTENTINAL

Explanation

To determine the scalar quantity among the given options, we need to understand what scalar quantities are and analyze each option accordingly.

### Step-by-Step Solution:

1. **Understanding Scalar Quantities**:
- Scalar quantities are defined as those that have only magnitude and no direction. Examples include temperature, mass, speed, and electric potential.

2. **Analyzing the Options**:
- **Option 1: Weight of the body**:
- Weight is the force exerted by gravity on an object and is calculated as \( W = mg \) (mass times acceleration due to gravity). Since weight has both magnitude and direction (it acts downwards), it is a vector quantity.
- **Conclusion**: Incorrect.

- **Option 2: Temperature Gradient**:
- The temperature gradient is defined as the rate of change of temperature with respect to distance, expressed mathematically as \( \frac{dT}{dx} \). This quantity has a direction (it indicates the direction of increasing temperature) and thus is also a vector quantity.
- **Conclusion**: Incorrect.

- **Option 3: Tension**:
- Tension is a force that is transmitted through a string, rope, or wire when it is pulled tight by forces acting from opposite ends. Like weight, tension has both magnitude and direction, making it a vector quantity.
- **Conclusion**: Incorrect.

- **Option 4: Electric Potential**:
- Electric potential is defined as the amount of electric potential energy per unit charge at a point in space. It is a scalar quantity because it has only magnitude and no direction. The formula for electric potential due to a point charge is given by \( V = \frac{kq}{r} \), where \( k \) is a constant, \( q \) is the charge, and \( r \) is the distance from the charge.
- **Conclusion**: Correct.

3. **Final Answer**:
- The scalar quantity among the options provided is **Electric Potential**.