The practical unit for the measurement of electric power is

Options

A. watt
B. kilowatt
C. kilowatt hour
D. horse power

Answer

To find the practical unit for the measurement of electric power, we can analyze the options given in the question step by step.

### Step 1: Understand the options provided
The options for the practical unit of electric power are:
1. Watt
2. Kilowatt
3. Kilowatt-hour
4. Horsepower

### Step 2: Define each option
- **Watt (W)**: This is the basic unit of power in the International System of Units (SI). It measures the rate of energy transfer equivalent to one joule per second.
- **Kilowatt (kW)**: This is a larger unit of power equal to 1,000 watts (10^3 W). It is often used for larger power ratings, such as in household appliances.
- **Kilowatt-hour (kWh)**: This is a unit of energy, not power. It represents the amount of energy consumed when a power of one kilowatt is used for one hour.
- **Horsepower (hp)**: This is another unit of power, commonly used to measure the power of engines. One horsepower is approximately equal to 746 watts.

### Step 3: Identify the practical unit
The question specifically asks for the practical unit of electric power. While kilowatt is a larger unit, it is derived from the watt. However, the watt is the fundamental unit of power and is widely used in practical applications.

### Step 4: Conclusion
Based on the definitions and the context of the question, the practical unit for the measurement of electric power is the **Watt**.

### Final Answer
The practical unit for the measurement of electric power is **Watt** (Option 1).

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