Find the value of energy if power consumed is 40W in 10 hours ?

Options

A. 400Wh
B. 522 Wh.
C. 222 Wh
D. 32J

Explanation

To find the value of energy consumed when the power is given, we can use the relationship between power, energy, and time. The formula we will use is:

\[ \text{Energy} = \text{Power} \times \text{Time} \]

### Step-by-Step Solution:

1. **Identify the given values**:
- Power (P) = 40 Watts
- Time (T) = 10 hours

2. **Convert the time into the appropriate unit**:
- Since we need the energy in watt-hours, we can keep the time in hours. Thus, T = 10 hours.

3. **Substitute the values into the formula**:
- Using the formula \( \text{Energy} = \text{Power} \times \text{Time} \):
\[ \text{Energy} = 40 \, \text{W} \times 10 \, \text{h} \]

4. **Calculate the energy**:
- Multiply the power by the time:
\[ \text{Energy} = 40 \times 10 = 400 \, \text{Watt-hours} \]

5. **Conclusion**:
- The energy consumed is 400 Watt-hours.

### Final Answer:
The value of energy consumed is **400 Watt-hours**.

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