Right answer: a Joule divided by a second
The Watt is the unit of Electrical Power of the International System of Units that is equivalent to a Joule ([tex]J[/tex]) per second ([tex]s[/tex]) and the symbol that identifies this unit is [tex]W[/tex]:
[tex]1W=J/s[/tex]
In other words, this unit represents the amount of energy (in Joules) delivered or absorbed by an element in a given time (in seconds). The Watt is also the electric power produced by a potential difference of a Volt [tex]1V[/tex] and an electric current of an Ampere [tex]1A[/tex].
It is important to note the name given to this unit of measurement is in honor of Scottish engineer and inventor James Watt, due to his contributions in the development of the steam engine.
Therefore the right answer is 1: a joule divided by a second
