Answer:
Difference between watt and horse power is that watts ae used to measure electricity and horse power is used to measure car's engine power
The above answer is incorrect. The correct answer is simply that the watt is the SI (metric) unit of measurement for power, whereas the horsepower is the Imperial unit for power. Either unit can be used to measure power. Outside North America, for example, the power of a car engine is measured in kilowatts, and the horsepower is considered obsolete.