What is the formula for watts law?

Answer 1

The real Watt's law is a hypothesis that states the sum of the latent heat of steam at any temperature of generation and the heat required to raise water from 0°C to that temperature is constant. It has been proven to be incorrect.

However electricity amateurs and even some instructors often incorrectly describe Watt's Law as stating P=VI (or P=IE). This is actually called "Power Law". The term "Watt's Law" should not be used here.

Read more: What_is_watts_law_and_component

Answer 2

Any of the following may be used, depending on what quantities are known:

-- multiply (volts) x (amps)

-- divide (volts)2 by (ohms)

-- multiply (amps)2 by (ohms)

-- divide (joules) by (seconds)

-- multiply (kilowatt-hours) by (36,000), then divide by (seconds)