Introduction
Joule's law and joule's effects was discovered by a Physicist
James Prescott Joule.The following are the laws which was discovered by Physicist
James Prescott Joule:
· Joule's First Law
This law is a physical law which expresses the relationship between the heat generated and current flowing
through a conductor.
· Joule's Second Law
It states
that the internal energy of an ideal gas is independent of its volume and
pressure, depending only on its temperature.
· Magneto-Striction
A property of
ferromagnetic materials that causes them to change their shape when subjected
to a magnetic field.
· The Joule–Thomson Effect
The
temperature change of a gas (usually cooling) when it is allowed to expand
freely.
· The Gough–Joule Effect
It is the tendency of elastomers to contract if heated while they are under tension.
Joule's First Law
In between 1840 and 1843 Joule was studying about the heat
which produces by an electric current in any conductor and from this study he
made his first law which is called the joule's law of heating and it is also
called joule's effect. From this law James Prescott Joule told the world that
when the current passes through a conductor, the current effects on the
conductor and the conductors starts heating and by this analysis energy
converts into its different forms.
Magneto-Striction
In 1842 James Prescott Joule made his new effect which is
called magneto-striction effect. This effect describes that this is a property of
material named ferromagnetic that changes its shape and dimension during the
process of magnetization. The variation of materials is because of applied
magnetic field which changes their strain and saturation value.
The Joule–Thomson Effect
The joules expansion is the process of irreversible in
thermodynamics in which a volume of a gas is kept on one side of an isolated
container when gas is shifted on the other side of container then the gas is
filled on the whole container
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