In 1791 Luigi Galvani: Professor of anatomy (university
of bologna) with the help of series of experiments showed the presence
of electricity in animals (specifically frogs).
In 1799 Charles coulomb: One famous scientist of the 18th
century demonstrated that there existed a force between any two
charges, this force could be either attractive force or repulsive force
and this force is also influenced by the distance of separation
between the two charges.
In 1799 Allessandro Volta : An Italian scientist credited
with the invention of battery. He was the first to develop a battery
know as the voltaic cell that could produce electricity as a result of
chemical reaction.
In 1820, Hans Christian oersted showed that a magnetic
field is associated whenever current flows through a conductor. To
demonstrate this effect he connect a copper wire to the terminals of a
battery and a switch and placed a magnetic compass near the wire. When
the switch was close current started flowing in the wire and a
deflection was seen in the compass indicating that current carrying
conductor has an associated magnetic field.
In 1827 George simonOhm, a germen physicist derived
the relation between the voltage applied (V), the current (I), and the
resistance of a circuit. This is the famous and the most basic law
Ohm’s law. It is given as V=IR.
In 1831 Michael Faraday , a British scientist after the
discovery by Oersted that a magnetic field is associated with the
conductor carrying current, Faraday through a series of experiments
discovered that the vice versa is possible i.e. current can be
generated by using time varying magnetic field. This phenomenon was
termed as the Electromagnetic induction which is the basic underlying
principle of the working of generators.
In 1864 James Clerk Maxwell, A British Physicist developed
the electromagnetic field equations that today is referred to as
Maxwell’s equations. He also formulated an important theory known as the
electromagnetic theory of light, which told that electromagnetic waves
travel in free space at the speed of light.
In 1888 Heinrich Hertz, Based on the predictions of
Maxwell’s electromagnetic theory wanted to experimentally verify the
theory. He performed various experiments according to what Maxwell’s
theory and successfully demonstrated to the world the effect of
electromagnetic radiation through space .
In 1895 Guglielmo Marconi put together the predictions of
Maxwell and the experiments of Hertz to send electromagnetic signals
through space and was successful in setting up the first transatlantic
wireless communication system.
In 1948, William Schockley, John Bardeen and Watter Brattain developed the transistor.
Nikola Tesla: One great scientist without whom our today’s
world would have been dark. Yes he invented alternating current
(Popularly known as AC) and gave light to the world. He also has his name Tesla as the unit of magnetic field added to his credit.
