A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Electronegativity
Chemical property
which describes tendency of an atom to accept electrons.
Electroplating
See electro deposition.
Electroscope
An instrument which was first invented by
William Gilbert in 16th century, used to detect electric charge and
measure its magnitude.
Electrostatic
Precipitation
A process that removes suspended dust
particles from a gas by applying electrostatic charge to the particles and
collecting them on charged plates.
Electrochemical
Cell
Arrangement in
which two different metals are placed in conducting liquid called as
electrolyte, with electrical potential difference between them. A pair of
different metals arranged in this way is an electrochemical cell. This
arrangement transfers chemical energy to electrical energy.
Electrodynamics
The quantum
mechanical laws combined with laws of electricity came to be known as special
branch called electrodynamics.
Electrolysis
The phenomenon
which occurs in electrolytic cells involving breaking of electrolytes when
electric current is passed through them.
Electrolyte
A solution
through which an electric current may be generated by motion of ions.
Electromagnetic
Radiation
Radiation which
propagates in the form of wave in which electric field and magnetic field lies
perpendicular to each other and also to the direction of propagation.
Electromagnet
It is a device
consisting of a core of magnetic material such as iron, surrounded by a coil
through which an electric current
is passed to magnetize the core. Electromagnets are particularly useful where ever
controllable magnets are required, as in devices in which the magnetic field
is to be varied, reversed, or switched on and off. Other devices that utilize
electromagnets include particle accelerators, telephone receivers,
loudspeakers, and televisions.
Electromagnetic
Induction
Phenomenon in
electromagnetics as per which “any electric field that changes over time will
produce a magnetic field in the space around it” and “any magnetic field that
changes over time will produce an electric field in the space around it “.
Electromagnetic
Interaction
The type of
interaction between two charged particles by exchange of photons is called as
electromagnetic interaction. The strength of electromagnetic interaction is
given by dimensionless fine structure constant α = 1/137 and is due to photon exchanges.
Electromagnetic
Spectrum
Electromagnetic radiation
fall in wide range from gamma rays (emitted by radioactive materials) having
wavelengths on the order of 10-14 meter, through x-rays, UV, Visible,
Infrared and radio waves with wavelengths as long as 105 meter.
Electromagnetic
Theory
The theory which
aims at explaining combined effect of electric & magnetic fields. This
theory considers electric & magnetic force as different facets of more
fundamental force. The most basic idea in electromagnetic theory is “a changing
electric field generates a magnetic field” and “a changing magnetic field
generates a electric field.” These principles are quantified by Maxwell’s
equations, named for James Clerk Maxwell, the Scottish physicist and mathematician whose work in the 19th
century established the discipline by revolutionizing how physicists conceived
of light. The success of electromagnetic theory led to the collapse of the rest
of Newtonian physics in the 20th century.
Electromagnetism
It is branch of
physics which deals with electricity and magnetism, their interaction with each
other and with electric charges and currents. Michael Faraday
showed in 1831, that a changing magnetic field can induce a current in a
circuit, and James Clerk Maxwell predicted that a changing electric field has an associated magnetic
field.
Electrometer
High sensitive
instrument used to measure electric charge or potential difference.
Electromotive
Force
It is the work
done on unit positive charge in taking it through low potential end to high
potential end.
Electromotive
Series
A ranking of
metallic elements according to their standard electrochemical cell potentials.
Electron
It
is an elementary particle classified as Lepton, having spin ½, negatively
charged and which interacts weakly with other particles.
(or)
It
is a subatomic particle which carries a negative charge and is considered as
the basic unit of electric charge.
The rest mass of the electron is 9.109 × 10−31 kg. It is the basic
unit of electric charge having value of 1.6 x 10-19 Coulomb.
