DictionaryjouleUnit of energy
noun

joule

JOOL/dʒuːl/

The SI unit of energy or work.

The meter records one joule of energy supplied to the glowing bulb.

A laboratory energy meter connected between a battery and a small glowing bulb displays “1 J,” making the standard energy unit visible as an actual instrument reading.
Etymology

The energy unit was named in recognition of British physicist James P. Joule. Its connection to energy is commemorative, not a meaning carried by the surname.

In context

FuseSchool - Global Education0:19
the unit of energy is a joule however when dealing with electricity we actually use watts a watt is a measure of power where one watt is equal to one joule per second
Energy Use In Electrical Appliances | Energy | Physics | FuseSchool

More examples

  • The battery stores 500 joules of energy.
  • A force of one newton acting over one meter does one joule of work.
  • We measure the heat released by the reaction in joules.

Forms

joule · joules

Similar words

calorie
A different energy unit, equal to about 4.184 joules.
erg
A smaller energy unit, equal to one ten-millionth joule.