Which one of the following physical quantities is not a fundamental quantity?

Options

A. Luminious intensity
B. Thermodynamic temperature
C. Electric current
D. work

Explanation

To determine which physical quantity is not a fundamental quantity, we will analyze the options provided:

1. **Understanding Fundamental Quantities**:
- Fundamental quantities are those that cannot be expressed in terms of other quantities. They are independent and serve as the building blocks for other derived quantities.
- There are seven fundamental quantities recognized in physics:
- Mass (m)
- Length (l)
- Time (t)
- Electric Current (I)
- Thermodynamic Temperature (T)
- Amount of Substance (n, mole)
- Luminous Intensity (Iv)

2. **Analyzing the Options**:
- **Option A: Luminous Intensity**: This is a fundamental quantity.
- **Option B: Thermodynamic Temperature**: This is also a fundamental quantity.
- **Option C: Electric Current**: This is a fundamental quantity as well.
- **Option D: Work**: Work is defined as the product of force and distance (W = F × d). Since force is a derived quantity (it is mass times acceleration), work is also a derived quantity.

3. **Conclusion**:
- Among the options provided, work is the only quantity that is not fundamental. Therefore, the answer to the question is **Option D: Work**.

### Summary of Steps:
1. Define fundamental quantities.
2. List the seven fundamental quantities.
3. Analyze each option to determine if it is fundamental or derived.
4. Conclude that work is not a fundamental quantity.