Before 18th century people thought that magnetism
and electricity were separate subjects of study. After Oersted experiment the
electricity and magnetism were united and became a single subject called
Electromagnetism. Oersted’s experiment was grateful help of faraday’s
electromagnetic induction. When there is
current, the magnetic field is produced and the current carrying conductor
behaves like a magnet. You may now wonder how was it possible for a lodestone
to behave like a magnet when there was no current passing through it.
This experiment was reversed by the faraday; he had
understood when the electromagnetic induction is occurring current will
produced. That work was help to got noble prize for both. In the twentieth century only we understood
that the magnetic property arises due to the motion of electrons in the
lodestone. In the circuit the electrons flow from negative of the battery to
positive of the battery and constitutes current. As a result it produces
magnetic field. Using the faraday’s electromagnetic induction world will change
the current producing technology.
The extraordinary
change in electricity was done by both researches. That electromagnetic
induction is used in many other fields. It was vast application today. If we have induced a magnet, it will create current in the circuit. We can able to see the deflection of galvanometer.
