1 joule equals

Options

A. `AV s ^(-1)`
B. `AV ^(-1) s`
C. `Avs`
D. `A ^(-1) Vs`

Explanation

To find out what 1 joule equals, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Joule**:
- Joule (J) is the SI unit of energy.

2. **Energy Definition**:
- Energy can be defined in terms of power and time. The formula is:
\[ \text{Energy} = \text{Power} \times \text{Time} \]

3. **Defining Power**:
- Power (P) can be expressed as:
\[ \text{Power} = \text{Voltage} \times \text{Current} \]
- In terms of units, this can be written as:
\[ P = V \times I \]
- Where:
- \( V \) is voltage (measured in volts, V)
- \( I \) is current (measured in amperes, A)

4. **Substituting Power in Energy Equation**:
- Now substituting the power equation into the energy equation:
\[ \text{Energy} = (V \times I) \times T \]
- Where \( T \) is time (measured in seconds, s).

5. **Combining Units**:
- Therefore, we can express 1 joule as:
\[ 1 \text{ J} = 1 \text{ V} \times 1 \text{ A} \times 1 \text{ s} \]

6. **Final Expression**:
- Thus, we conclude that:
\[ 1 \text{ Joule} = 1 \text{ Volt} \times 1 \text{ Ampere} \times 1 \text{ Second} \]

### Conclusion:
1 Joule is equal to 1 Volt × 1 Ampere × 1 Second (1 J = 1 V × 1 A × 1 s).