How many watt-hours are there in 1000 joules? Please explain mathematically.
Start with the basic definition:
1 Joule is energy lost as heat when an electric current of 1 ampere passes through a resistance of 1 ohm for 1 second.
Consider the power generated in the above circuit in watts:
So that is 1 watt-second
1 hour is 3600 seconds
So 1000 joules will be