How many watts are equivalent to 1 horsepower?

• A. 500 watts
• B. 746 watts
• C. 1000 watts
• D. 1200 watts

Answer: (B)

One horsepower is equivalent to 746 watts. This conversion is based on the historical definition of horsepower, which was established in the 18th century by James Watt to compare the output of steam engines with the power of draft horses. The watt is the standard unit of power in the International System of Units (SI), and it reflects work done over time.

The definition indicates that one horsepower can do a specific amount of work—equating to 746 watts—over a set time period, which illustrates the relationship between mechanical power and electrical power. This is crucial in various applications, particularly when comparing the power specifications of engines versus electric motors, as it allows a clear understanding of their performance relative to one another.

The other options suggest incorrect values that are not supported by the standard conversion metric used in engineering and physics.