Electronics ,Discovery Of Electrons

Electronics is
that branch of applied physics which deals with the control of motion of
electrons using different devices.

Discovery
Of Electrons:

In the 1850's, physicists started to examine the passage of electricity through
a vacuum by putting two electrodes in a sealed vacuum tube.

Some kind of rays were emitted from the
cathode or the negative electrode. These rays were

called cathode rays. J.J. Thomson in 1897 observed
the deflection of cathode rays by both electric and magnetic fields.

From
these deflection experiments, he concluded

that cathode rays must carry a negative charge. These negatively charged particles
were given the name electrons