Glossary of Electronic Terms, Electronic terms starting from alphabet E
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Electronic:
The use of active electronic components (integrated
circuits, transistors, valves etc) which require a power supply to function.
Such "active" components will always be used in conjunction with passive
components
Earth (1):
also known as ground - commonly used to describe the
chassis and other materials that provide a return path for power supplies and
signals within any electronic device
Earth (2):
also known as ground - a protective connection from wall
outlet to equipment chassis to conduct fault currents away from human contact
Electromagnetic Interference (EMI):
an unwanted (possibly
interfering) signal emitted by any electronic apparatus. The emission of EMI
is heavily regulated in most countries.
Electromagnetic Radiation (EMR):
a transmission medium that includes
radio waves and light waves.
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Eddy currents
Currents induced into a conducting core
due to the changing magnetic field. Eddy currents produce heat which is a loss
of power and lowers the efficiency of an inductor.
Efficiency
The amount of power delivered to the
load of an amplifier as a percentage of the power required from the power
supply.
Electric charge
Electric energy stored on the surface
of a material. Also known as a static charge.
Electric field
A field or force that exists in the
space between two different potentials or voltages. Also known as an
electrostatic field.
Electricity
Science states that certain particles
possess a force field or charge. The charge possessed by an electron is
negative while the charge possessed by a proton is positive. Electricity can
be divided into two groups, static and dynamic. Static electricity deals with
charges at rest and dynamic electricity deals with charges in motion.
Electric polarization
A displacement of bound charges in a
dielectric when placed in an electric field.
Electroluminescence
Conversion of electrical energy into
light energy.
Electrolyte
Electrically conducting liquid (wet) or
paste (dry)
Electrolytic capacitor
A capacitor having an electrolyte
between the two plates. A thin layer of oxide is deposited on only the
positive plate. The oxide acts as the dielectric for the capacitor.
Electrolytic capacitors are polarized and so must be connected in correct
polarity to prevent breakdown.
Electromagnet
A coil of wire usually wound on a soft
iron or steel core. When current is passed through the coil a magnetic field
is generated. The core provides an easy path for the magnetic lines of force.
This concentrates the field in the core.
Electromagnetic induction
Voltage produced in a coil due to
relative motion between the coil and magnetic lines of force.
Electromagnetic spectrum
List or diagram showing the range of
electromagnetic radiation.
Electromagnetic wave
Wave that consists of both electric and
magnetic variation.
Electromagnetism
Relates to the magnetic field generated
around a conductor when current is passed through it.
Electromotive force
(emf) Force that causes the motion of
electrons due to potential difference between two points. (voltage)
Electron
Smallest sub atomic particle of
negative charge that orbits the nucleus of an atom.
Electron flow
Electrical current produced by the
movement of free electrons towards a positive terminal.
Electrostatic
Related to static electric charge.
Electrostatic field
Force field produced by static
electrical charges.
Emitter
The semiconductor region from which
charge carriers are injected into the base of a bipolar junction transistor.
Energized
Being electrically connected to a
voltage source so the device is activated.
Energy
Capacity to do work.
Equivalent resistance
Total resistance of all the individual
resistances in a circuit
Partner:
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