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See searches and references containing ELECTRICAL LENGTH!ELECTRICAL LENGTH
Parameter characterizing an AC conductor
In electrical engineering, electrical length is a dimensionless parameter equal to the physical length of an electrical conductor such as a cable or wire
Electrical_length
Branch of engineering
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity
Electrical_engineering
Measure used in radio engineering and telecommunications
the source is independent of the transmission line's electrical length. Since the electrical length of a physical segment of transmission line depends on
Standing_wave_ratio
Antenna constructions for different applications
ballpoint pen. The helical shape adds both electrical length and inductance; the extra, compressed length lowers the excess capacitive reactance of the
Antenna_types
Short electrical transmission line
purely reactive; either capacitive or inductive, depending on the electrical length of the stub, and on whether it is open or short circuit. Stubs may
Stub_(electronics)
Assembly of one or more wires running side by side or bundled
geometry. Shielding makes use of the electrical principle of the Faraday cage. The cable is encased for its entire length in foil or wire mesh. All wires running
Electrical_cable
Conduction of electricity through an insulator under sufficiently high voltage
In electronics, electrical breakdown or dielectric breakdown is a process that occurs when an electrically insulating material (a dielectric), subjected
Electrical_breakdown
Object or material which allows the flow of electric charge with little energy loss
In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electric current) in one or more directions
Electrical_conductor
SI derived unit of electrical resistance
standard length of telegraph wires; different agencies used different bases for a standard, so units were not readily interchangeable. Electrical units so
Ohm
Measure of a substance's ability to resist or conduct electric current
In physics, electrical resistivity and electrical conductivity are two intrinsic properties of materials that measure a material's local, intrinsic ability
Electrical resistivity and conductivity
Electrical_resistivity_and_conductivity
Type of radio antenna
The length of a whip antenna is determined by the wavelength of the radio waves it is used with. Their length varies from compact electrically short
Whip_antenna
Device that transmits and receives radio waves
resulting (lower) electrical resonant frequency of such a system (antenna plus matching network) is described using the concept of electrical length. An antenna
Antenna_(radio)
Device used to join electrical conductors
of an electrical circuit are electrically connected if an electric current can run between them through an electrical conductor. An electrical connector
Electrical_connector
Antenna with a fractal shape
inductance and self capacitance. In general, although their effective electrical length is longer, the fractal element antennas are themselves physically
Fractal_antenna
Instrument that measures the network parameters of electrical networks
parameters of electrical networks. Today, network analyzers commonly measure s–parameters because reflection and transmission of electrical networks are
Network_analyzer_(electrical)
Flow of electric charge
is a flow of charged particles, such as electrons or ions, through an electrical conductor or space. It is defined as the net rate at which electric charge
Electric_current
Antenna consisting of two rod-shaped conductors
The feedpoint impedance of a dipole antenna is sensitive to its electrical length and feedpoint position. Therefore, a dipole will generally only perform
Dipole_antenna
Class of radio antenna
length (length measured in wavelengths of the radio wave in free space). The electrical length of a linear antenna is longer than its physical length
Monopole_antenna
Radio aerial composed of directly-connected and passive elements
or active element (also called driven radiator or active radiator) is electrically connected to the receiver or transmitter while a parasitic element (or
Driven_and_parasitic_elements
Opposition to the passage of an electric current
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance
Electrical resistance and conductance
Electrical_resistance_and_conductance
Measure of electrostatic effect and how far it persists
its electrostatic effect persists. With each Debye length the charges are increasingly electrically screened and the electric potential decreases in magnitude
Debye_length
Tube used to protect and route electrical wiring in a building or structure
An electrical conduit is a tube used to protect and route electrical wiring in a building or structure. Electrical conduit may be made of metal, plastic
Electrical_conduit
Contraction of length in the direction of propagation in Minkowski space
Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in
Length_contraction
Electrical circuit with equal-length transmission lines
Commensurate line circuits are electrical circuits composed of transmission lines that are all the same length; commonly one-eighth of a wavelength. Lumped
Commensurate_line_circuit
American supercomputer architect (1925–1996)
Seymour Roger Cray (September 28, 1925 – October 5, 1996) was an American electrical engineer, computer scientist, mathematician, and supercomputer architect
Seymour_Cray
Any analogy between electrical and mechanical systems, used for modelling
Mechanical–electrical analogies are the representation of mechanical systems as electrical networks. At first, such analogies were used in reverse to
Mechanical–electrical analogies
Mechanical–electrical_analogies
Type of electrical resistance from an antenna
Radiation resistance is that part of an antenna's feedpoint electrical resistance caused by the emission of radio waves from the antenna. A radio transmitter
Radiation_resistance
Electrical component
impedance transformer, is a transmission line or waveguide used in electrical engineering of length one-quarter wavelength (λ), terminated with some known impedance
Quarter-wave impedance transformer
Quarter-wave_impedance_transformer
Material that does not conduct an electric current
An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot
Insulator_(electricity)
Adjusting input/output impedances of an electrical circuit for some purpose
line with characteristic impedance R 0 {\displaystyle R_{0}} and electrical length θ = β l = φ . {\displaystyle \theta =\beta l=\varphi .} Whenever a
Impedance_matching
Joint in electrical or optical cable
In electrical engineering and telecommunications, a line splice is a joint directly connecting lengths of electrical cables (electrical splice) or optical
Line_splice
Telecommunications device
frequency components whose wavelength is a significant fraction of the electrical length of the feed line, distortion of the transmitted information will occur
Antenna_tuner
Multi-element, directional antenna useable over a wide band of frequencies
line, connected in parallel to the feedline with alternating phase. Electrically, it simulates a series of two- or three-element Yagi–Uda antennas connected
Log-periodic_antenna
Electrical installation of cabling
Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, receptacles, outlets, and light
Electrical_wiring
Law of electrical current and voltage
measurements of applied voltage and current through simple electrical circuits containing various lengths of wire. Ohm explained his experimental results by a
Ohm's_law
Type of radio antenna
through a transmission line, and additional passive radiators with no electrical connection, usually including one so-called reflector and any number of
Yagi–Uda_antenna
Cable or other structure for carrying radio waves
In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner
Transmission_line
Opposition of a circuit to a current when a voltage is applied
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit
Electrical_impedance
Antenna fabricated using photolithographic techniques
because of the extended electric "fringing fields" which increase the electrical length of the antenna slightly. An early model of the microstrip antenna
Microstrip_antenna
Electrically conductive surface, usually connected to electrical ground
In electrical engineering, a ground plane is an electrically conductive surface, usually connected to electrical ground. Ground planes are typically made
Ground_plane
Constant describing the distance a membrane potential passively travels along a neuron
neurite via passive electrical conduction. The greater the value of the length constant, the further the potential will travel. A large length constant can contribute
Length_constant
Connector used to connect to mains power
to mains electricity to supply them with electrical power. A plug is the connector attached to an electrically operated device, often via a cable. A socket
AC_power_plugs_and_sockets
Directional variation in strength of radio waves
ISBN 81-203-0054-8 Institute of Electrical and Electronics Engineers, "The IEEE standard dictionary of electrical and electronics terms"; 6th ed. New
Radiation_pattern
initial voltage it was charged to) and a rise time equal to twice the electrical length of the transmission line. The device acts as a distributed pulse forming
Vector_inversion_generator
Interconnected network for delivering electricity to consumers
An electrical grid (or electricity network) is an interconnected network for electricity delivery from producers to consumers. Electrical grids consist
Electrical_grid
Comparative measure of electrostatic and thermal energy
Bjerrum length λB increases with temperature, as shown in the graph above. Debye length Debye–Hückel equation Shielding effect Screening effect Electrical double
Bjerrum_length
Standard for serial communication
Electronic Industries Alliance, first issued in 1975, that specifies the electrical characteristics of a digital signaling circuit. It was meant to be the
RS-422
Early system for transmitting text over wires
Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the
Electrical_telegraph
Telecommunications performance metric
wave's power intercepted by the antenna which is actually delivered as an electrical signal. It is not to be confused with antenna efficiency, which applies
Radiation_efficiency
Electrical safety device that provides overcurrent protection
electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit. Its
Fuse_(electrical)
Electromechanical device
an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be
Slip_ring
Characteristic of a radio antenna
conductors, the effective length (units: meter) is used to measure the ratio between voltage and electric field. Antenna effective length Electronic Warfare
Antenna_factor
Antenna capable of modifying its frequency and radiation properties dynamically
antenna. Frequency reconfiguration is generally achieved by physical or electrical modifications to the antenna dimensions using RF-switches, impedance loading
Reconfigurable_antenna
Antenna used in wireless communication
antenna to the full required length, the antenna may be meandered to reduce its height while retaining its designed electrical length. This can be compared to
Inverted-F_antenna
Measure of how much of an antenna's signal is transmitted in one direction
ISSN 1558-2221. S2CID 54196716. Institute of Electrical and Electronics Engineers, “The IEEE standard dictionary of electrical and electronics terms”; 6th ed. New
Directivity
Impedance – Insulation – Electrical length – Load – Electrical network – Circuit – Electrical resistance – Electrical room – Electrical signal – Electricity
Index_of_electronics_articles
Regions of an electromagnetic field
EM exciting potential). This generates an oscillating (or reversing) electrical dipole, which affects both the near field and the far field. The boundary
Near_and_far_field
Medical condition
Electrical alternans is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats and a possible wandering base-line
Electrical_alternans
Antenna with conducting wires in a helix
by the helix allows the antenna to be physically shorter than its electrical length of a quarter-wavelength. This means that for example a 1 /4 wave
Helical_antenna
Set of two dipole antennas
delay one by 90 degrees additional electrical length. Each phase is applied to one of the dipoles. By modifying the length and shape of the dipoles, the combined
Turnstile_antenna
Changing the direction of the main lobe of a radiation pattern
side, making it useful in only very limited situations. More common is electrical beam tilt, where the phasing between antenna elements is tweaked to make
Beam_steering
Ways in which length, distance or range can be measured
Length measurement, distance measurement, or range measurement (ranging) all refer to the many ways in which length, distance, or range can be measured
Length_measurement
Electrical breakdown of a gas that results in an ongoing electrical discharge
An electric arc (or arc discharge) is an electrical breakdown of a gas that produces a prolonged electrical discharge. The current through a normally nonconductive
Electric_arc
Machine that converts electrical energy into mechanical energy
An electric motor is a machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the
Electric_motor
Strip inside switchgear for local high current distribution
substations. They are also used to connect high voltage equipment at electrical switchyards, and low-voltage equipment in battery banks. They are generally
Busbar
Two-conductor flat cable used to carry radio frequency signals
adjust the size of the cuts to make fine adjustments to the feedline's electrical properties. The windows lighten the line, and reduce the amount of surface
Twin-lead
Antenna used with a television to receive television programs
telescoping rods attached to a base, which extend out to about 1 m (3.3 feet) length (approximately one-quarter wavelength at 54 MHz) and can be collapsed when
Television_antenna
Device to limit the current in lamps
An electrical ballast is a device placed in series with a load to limit the amount of current in an electrical circuit. A familiar and widely used example
Electrical_ballast
Type of radio antenna consisting of a loop or coil
radio antenna consisting of a loop or coil of wire, tubing, or other electrical conductor, that for transmitting is usually fed by a balanced power source
Loop_antenna
Receiving device on satellite dishes
satellite distribution systems operate in a similar way to conventional electrical LNBs, except that all four of the sub-bands in the entire Ku band spectrum
Low-noise_block_downconverter
Both electrical and electronics engineers typically possess an academic degree with a major in electrical/electronics engineering. The length of study
Education and training of electrical and electronics engineers
Education_and_training_of_electrical_and_electronics_engineers
Hollow electrical insulator
In electric power, a bushing is a hollow electrical insulator that allows an electrical conductor to pass safely through a conducting barrier, such as
Bushing_(electrical)
Electrical wiring standard in the United States
The National Electrical Code (NEC), or NFPA 70, is a regionally adoptable standard for the safe installation of electrical wiring and equipment in the
National_Electrical_Code
Behaviour of travelling radio waves
antennas (monopoles) are required. Since the ground is not a perfect electrical conductor, ground waves are attenuated as they follow the Earth's surface
Radio_propagation
Radio station in Santa Barbara, California, United States
12-foot "whiskers" in a horizontal X shape, to give the tower extra electrical length. The tower, which is owned by Rincon Broadcasting, was also painted
KZSB
Radio station in Santa Barbara, California, United States
12-foot "whiskers" in a horizontal X shape, to give the tower extra electrical length. The tower, which is owned by Rincon Broadcasting, was also painted
KOSJ
Electrical insulator
in overhead electrical wiring, to support radio antennas and overhead power lines. A strain insulator may be inserted between two lengths of wire to isolate
Strain_insulator
Radio station in Santa Barbara, California, United States
12-foot "whiskers" in a horizontal X shape, to give the tower extra electrical length. It was also painted dark green to better blend with its surroundings
KCLU_(AM)
The equivalent radius of an antenna electrical conductor is defined as: r e = exp { 1 L 2 ∮ ℓ ∮ ℓ ln | x − y | d x d y } {\displaystyle r_{e}=\exp
Antenna_equivalent_radius
Reference point in an electrical circuit from which voltages are measured
In electrical engineering, ground or earth may refer to reference ground – a reference point in an electrical circuit from which voltages are measured
Ground_(electricity)
Units defined only by physical constants
around 10−43 s and lengths of around 10−35 m (approximately the energy-equivalent of the Planck mass, the Planck time and the Planck length, respectively)
Planck_units
Increase in voltage at a long AC power line
in short lengths, because of their high capacitance per unit length, and lower electrical impedance. An equivalent to the Ferranti effect occurs when inductive
Ferranti_effect
Lossless data compression algorithms
encoded by a pair of numbers called a length–distance pair, which is equivalent to the statement "each of the next length characters is equal to the characters
LZ77_and_LZ78
Decimal-based systems of measurement
A system of measurement is a frame in which physical qualities (such as length, weight, temperature, etc.) can be quantified with numbers. Among many systems
Metric_system
Type of electrical power cable
cable, power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets
Extension_cord
Types of lamp
identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics. In the United States and
Fluorescent-lamp_formats
Bulk movement of electrical energy
transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. A long conductor used
Electric_power_transmission
SI base unit of electric current
electrodynamics. In recognition of Ampère's contributions to the creation of modern electrical science, an international convention, signed at the 1881 International
Ampere
Self-powered electric trains
usually formed of two or more semi-permanently coupled carriages. However, electrically powered single-unit railcars are also generally classed as EMUs. The
Electric_multiple_unit
Type of electrical connector
contact (IDC), also known as insulation-piercing contact (IPC), is an electrical connector designed to be connected to the conductor(s) of an insulated
IDC_(electrical_connector)
Power supply with electrochemical cells
or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the
Electric_battery
North American standard for electrical-wire diameters
predominantly in North America, for the diameters of round, solid, nonferrous, electrically conducting wire. Dimensions of the wires are given in ASTM standard B
American_wire_gauge
Type of electronic filter circuit
signal being transmitted on the line or a section of line of that electrical length. Distributed-element filters are mostly used at frequencies above
Distributed-element_filter
Standard for serial communication between devices without host computer
other. It is a message-based protocol, designed originally for multiplex electrical wiring within automobiles to save on copper, but it can also be used in
CAN_bus
Customary unit of length
The foot (standard symbol: ft) is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is
Foot_(unit)
Transmission line impedance matching
they have uniform cross-sectional dimensions along their length, giving them a uniform electrical characteristic impedance. Signal terminators are designed
Electrical_termination
Device used to measure electricity use
An electricity meter, electric meter, electrical meter, energy meter, kilowatt-hour meter, or power meter is a device that measures the amount of electric
Electricity_meter
Japanese light novel
alternate version of the 20th century Japan. Instead of the advancement of electrical power and innovations, technological progress was delayed and both was
Sparks_of_Tomorrow
Imperial unit for wire diameters, as defined in British Standard 3737
used for measuring the thickness of bicycle spokes and certain types of electrical wire. In modern applications, wire size is more commonly measured in terms
Standard_wire_gauge
Forensic electrical engineering is a branch of forensic engineering, and is concerned with investigating electrical failures and accidents in a legal context
Forensic electrical engineering
Forensic_electrical_engineering
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ELECTRICAL LENGTH
ELECTRICAL LENGTH
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ELECTRICAL LENGTH
ELECTRICAL LENGTH
ELECTRICAL LENGTH
ELECTRICAL LENGTH
ELECTRICAL LENGTH
ELECTRICAL LENGTH
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