Question

State the difference between 1 watt and 1 watt hour.

Answer 1

1 Watt : when an electrical appliance consumes electrical energy at the rate of 1 joule per second its power is said to be one watt.
1 watt = 1 joule/1 second.
one watt - hour is the amount of electrical energy consumed when an electrical appliance of 1 watt power is used for 1 hour.

Answer 2

One watt means one joule of work done for one second. One watt-hour is the power of one watt for one hour which means 3600 joules of work done in one hour or 3600 seconds.