*Question T5C11:
How much current is required to deliver 120 watts at a voltage of 12 volts DC?*  

*Correct Answer is  B: 10 amperes*  

### AI Response: (may contain errors)  

To determine the current required to deliver 120 watts at a voltage of 12 volts DC, we can use the formula for electrical power:

$$
P = V \times I
$$

where:
- $P$ = power in watts (W)
- $V$ = voltage in volts (V)
- $I$ = current in amperes (A)

We can rearrange this formula to solve for current ($I$):

$$
I = \frac{P}{V}
$$

Substituting the given values:

$$
I = \frac{120 \text{ W}}{12 \text{ V}} = 10 \text{ A}
$$

### Explanation of the Correct Answer:
- The correct answer is **10 amperes** because when we plug in the values for power and voltage into the rearranged formula, we find that the current required is indeed 10 A.

### Explanation of Incorrect Choices:
- **A: 0.1 amperes**: This is incorrect because it suggests a much lower current than needed. If $I$ were 0.1 A, the power would only be $12 \text{ V} \times 0.1 \text{ A} = 1.2 \text{ W}$, which is far less than 120 W.
  
- **C: 12 amperes**: This is incorrect because if $I$ were 12 A, the power would be $12 \text{ V} \times 12 \text{ A} = 144 \text{ W}$, which exceeds the required 120 W.
  
- **D: 132 amperes**: This is incorrect as it suggests an extremely high current. If $I$ were 132 A, the power would be $12 \text{ V} \times 132 \text{ A} = 1584 \text{ W}$, which is also far too high.

### Summary:
- The formula $I = \frac{P}{V}$ is essential for calculating current based on power and voltage.
- The correct answer is **10 amperes**, as it accurately reflects the current needed to deliver 120 watts at 12 volts.