Which of the following is a vector quantity?

Options

A. Temperature
B. Magnetic Flux density
C. Magnetic field intensity
D. Time

Answer

To determine which of the given options is a vector quantity, we need to understand the definitions and characteristics of vector and scalar quantities.

### Step-by-Step Solution:

1. **Definition of Vector Quantity**: A vector quantity is defined as a quantity that has both magnitude and direction. Examples include velocity, displacement, and force.

2. **Identify Options**: The question likely provides several options (not listed here). We will analyze each option based on the definitions of vector and scalar quantities.

3. **Analyze Each Option**:
- **Temperature**: This is a scalar quantity. It has magnitude (e.g., 30 degrees Celsius) but no direction.
- **Time**: This is also a scalar quantity. It only has magnitude (e.g., 10 seconds) and no direction.
- **Magnetic Flux Density**: This is a scalar quantity as it is derived from the dot product of two vectors (magnetic field and area), which results in a scalar.
- **Magnetic Field Intensity**: This is a vector quantity. It has both magnitude and direction (e.g., 5 A/m in a specific direction).

4. **Conclusion**: Among the options, the only vector quantity is **Magnetic Field Intensity**.

5. **Final Answer**: The vector quantity among the given options is **Magnetic Field Intensity**.