Joule's law
Joule's law (due to
James Prescott Joule) expresses the amount of heat generated by an electrical resistor, and is expressed by the relation
- Q is proportional to
by current
I flowing through a resistor with resistance
R for a time
t, and
Q is the heat generated
or
where
k is the
constant of proportionality, dependent on the units used to express
I,
R and
t. If amperes, ohms, and
seconds are used, and the result expressed in
joules, it is simply 1.