which one of the following is a scalar quantity?

Options

A. Dipole moment
B. Electric field
C. Acceleration
D. work

Answer

To determine which of the given options is a scalar quantity, we will analyze each option one by one.

### Step 1: Understand the definitions
- **Scalar Quantity**: A quantity that has only magnitude and no direction.
- **Vector Quantity**: A quantity that has both magnitude and direction.

### Step 2: Analyze each option
1. **Dipole Moment**:
- The dipole moment is defined as the product of the charge and the distance separating the charges, and it has a specific direction (from negative to positive charge).
- **Conclusion**: Dipole moment is a vector quantity.

2. **Electric Field**:
- The electric field is defined as the force per unit charge experienced by a positive test charge placed in the field. It has a direction (away from positive charges and towards negative charges).
- **Conclusion**: Electric field is a vector quantity.

3. **Acceleration**:
- Acceleration is defined as the rate of change of velocity. It has a direction (indicating whether the speed is increasing or decreasing).
- **Conclusion**: Acceleration is a vector quantity.

4. **Work**:
- Work is defined as the dot product of force and displacement. The dot product results in a quantity that has only magnitude and no direction.
- **Conclusion**: Work is a scalar quantity.

### Step 3: Identify the scalar quantity
From the analysis above, the only scalar quantity among the options provided is **Work**.

### Final Answer:
The scalar quantity from the given options is **Work**.

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