Watt sec represents the unit for

Options

A. energy
B. power
C. force
D. none of these

Answer

To determine what "Watt second" represents, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Units**:
- The unit of power is the Watt (W).
- The unit of time is the second (s).

2. **Definition of Watt**:
- 1 Watt is defined as 1 Joule per second (1 W = 1 J/s). This means that when 1 Joule of energy is used in 1 second, the power is 1 Watt.

3. **Expressing Watt Second**:
- When we multiply Watts by seconds, we have:
\[ \text{Watt second} = \text{W} \times \text{s} = \left( \frac{\text{J}}{\text{s}} \right) \times \text{s} = \text{J} \]
- This shows that Watt second is equivalent to Joules.

4. **Conclusion**:
- Since Joule (J) is the unit of energy, we conclude that Watt second represents energy.

5. **Final Answer**:
- Therefore, Watt second represents the unit for energy.