explain joules law?????
Answers
The joule (/dʒuːl/; symbol: J) is a derived unit of energy in the International System of Units.[1] It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or N⋅m). It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).[2][3][4]
joule
Unit system
SI derived unit
Unit of
Energy
Symbol
J
Named after
James Prescott Joule
Conversions
1 J in ...
... is equal to ...
SI base units
kg⋅m2⋅s−2
CGS units
1×107 erg
kilowatt hours
2.78×10−7 kW⋅h
kilocalories (thermochemical)
2.390×10−4 kcalth
BTUs
9.48×10−4 BTU
electronvolts
6.24×1018 eV
In terms firstly of base SI units and then in terms of other SI units:
where kg is the kilogram, m is the metre, s is the second, N is the newton, Pa is the pascal, W is the watt, C is the coulomb, and V is the volt.
One joule can also be defined as:
The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one coulomb-volt (C⋅V). This relationship can be used to define the volt.
The work required to produce one watt of power for one second, or one watt-second (W⋅s) (compare kilowatt-hour – 3.6 megajoules). This relationship can be used to define the watt.
understating the heat produced by an electric current flowing through a resistor for a time is proportional to i square Rt