*Question T5C10:
How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?*  

*Correct Answer is  B: 30 watts*  

### AI Response: (may contain errors)  

To calculate the power delivered by a voltage and current, we use the formula:

$$
P = V \times I
$$

where:
- $P$ = power in watts
- $V$ = voltage in volts
- $I$ = current in amperes

In this case, we have:
- $V = 12$ volts
- $I = 2.5$ amperes

Now, substituting the values into the formula:

$$
P = 12 \, \text{volts} \times 2.5 \, \text{amperes} = 30 \, \text{watts}
$$

### Explanation of the Correct Answer:
- The correct answer is **30 watts** because we correctly applied the power formula, resulting in $30$ watts.

### Explanation of Incorrect Choices:
- **A: 4.8 watts**: This value does not result from the multiplication of 12 volts and 2.5 amperes. It may be a miscalculation or confusion with another formula.
  
- **C: 14.5 watts**: This is also incorrect as it does not match the calculation. It could be a result of incorrect arithmetic or misunderstanding of the power formula.
  
- **D: 0.208 watts**: This value is far too low and does not correspond to the given voltage and current. It may arise from a misunderstanding of the units or a miscalculation.

### Summary:
- Use the formula $P = V \times I$ to find power.
- For this question, substituting the given values yields the correct answer of **30 watts**.