*Question T5A02:
Electrical power is measured in which of the following units?*  

*Correct Answer is  B: Watts*  

### AI Response: (may contain errors)  

Electrical power is measured in which of the following units? The correct answer is **Watts**.

### Explanation of the Correct Answer:
- **Watts (W)** is the standard unit of electrical power in the International System of Units (SI). It quantifies the rate at which electrical energy is transferred or converted. 

The formula for electrical power can be expressed as:
$$
P = V \times I
$$
where:
- $P$ = power in watts
- $V$ = voltage in volts
- $I$ = current in amperes

### Explanation of Incorrect Choices:
- **A: Volts**  
  - Volts (V) measure electrical potential difference, not power. They indicate how much potential energy is available to move charges.

- **C: Watt-hours**  
  - Watt-hours (Wh) measure energy, not power. It represents the total amount of energy consumed over time, calculated as power multiplied by time. For example, if a device uses 1 watt for 1 hour, it consumes 1 watt-hour of energy.

- **D: Amperes**  
  - Amperes (A) measure electric current, which is the flow of electric charge. While current is a component of power calculations, it does not represent power itself.

### Summary:
- The unit of electrical power is **Watts**.
- Other units like volts, watt-hours, and amperes measure different electrical properties (voltage, energy, and current, respectively). Understanding these distinctions is crucial for the Extra Class exam.