Which of the following following is not equal to watt?

Options

A. `"Joule" // "second"`
B. `"Ampere" xx "volt"`
C. `("Ampere")^(2) xx "ohm"`
D. `"Ampere" // "volt"`

Explanation

To determine which of the following options is not equal to a watt, we need to analyze the definitions and relationships of power in terms of energy, voltage, current, and resistance.

### Step-by-Step Solution:

1. **Understanding the Definition of Watt**:
- The unit of power, watt (W), is defined as the rate at which energy is transferred or converted.
- Mathematically, it is expressed as:
\[ 1 \text{ watt} = 1 \text{ joule/second} \]

2. **Power in Terms of Voltage and Current**:
- According to the formula for electrical power:
\[ P = V \times I \]
- Here, \(P\) is power in watts, \(V\) is voltage in volts, and \(I\) is current in amperes.
- Therefore, we can express watt as:
\[ 1 \text{ watt} = 1 \text{ volt} \times 1 \text{ ampere} \]

3. **Using Ohm's Law**:
- Ohm's law states that \(V = I \times R\), where \(R\) is resistance in ohms.
- Substituting this into the power equation gives:
\[ P = I^2 \times R \]
- This means:
\[ 1 \text{ watt} = 1 \text{ ampere}^2 \times 1 \text{ ohm} \]

4. **Comparing Different Units**:
- Now, we have established that:
- \(1 \text{ watt} = 1 \text{ joule/second}\)
- \(1 \text{ watt} = 1 \text{ volt} \times 1 \text{ ampere}\)
- \(1 \text{ watt} = 1 \text{ ampere}^2 \times 1 \text{ ohm}\)

5. **Identifying the Incorrect Option**:
- We need to compare these definitions to the options provided.
- If an option does not match any of the definitions above, it is the one that is not equal to a watt.

6. **Conclusion**:
- After analyzing the options, we find that the option that does not equate to watt is the one that does not fit into any of the derived expressions for watt.

### Final Answer:
The option that is not equal to watt is **D** (the specific option would depend on the choices given).