Search results
Results from the WOW.Com Content Network
10 −15: femto-(fW) 2.5 × 10 −15: −116 dBm tech: minimum discernible signal at the antenna terminal of a good FM radio receiver 10 −14: 1 × 10 −14: −110 dBm tech: approximate lower limit of power reception on digital spread-spectrum cell phones 10 −12: pico-(pW) 1 × 10 −12: −90 dBm biomed: average power consumption of a ...
PCS—Power conversion system, electric power conversion. Plant Control System. PCT—Programmable Communicating Thermostat (electricity), Production Conformity Test; PD—Preliminary Determination; PDC—Phasor data concentrator. See description in phasor measurement unit article. (electricity) PDCI—Pacific Direct Current Intertie (US ...
Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge.Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.
Electric power is the rate of transfer of electrical energy within a circuit.Its SI unit is the watt, the general unit of power, defined as one joule per second.Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively.
1.0 nW = 1000 pW: The Earth receives one nanowatt per square metre from a magnitude +3.5 star [15] −70 dBm: 100 pW: −73 dBm: 50.12 pW "S9" signal strength, a strong signal, on the S meter of a typical ham or shortwave radio receiver: −80 dBm: 10 pW: −100 dBm: 0.1 pW: Minimal received signal power of wireless network (802.11 variants ...
[10] Pulse-width modulation (PWM) is used in a variety of electronic situations, such as power delivery and voltage regulation. In electronic music, music synthesizers vary the duty cycle of their audio-frequency oscillators to obtain a subtle effect on the tone colors. This technique is known as pulse-width modulation.
Class Photograph Manufacturer/Year Number Status Withdrawn Power Notes Class 40: 1957 7 Withdrawn 1993 800 kW (1072 hp) Class 41: Alstom (2000) 96 In Service n/a 970 kW (1305 hp) Class 42: 1954 6 Withdrawn 1994 400 kW (535 hp) Class 43: 1954 30 Class 44: 1954 10 Withdrawn 2001 356 kW (480 hp) Class 45: 1954 10 Class 46: 1952 20 Withdrawn 1994 ...
Electric utilities measure energy using an electricity meter, which keeps a running total of the electrical energy delivered to a customer. Electric heating is an example of converting electrical energy into thermal energy. The simplest and most common type of electric heater uses electrical resistance to convert the energy. There are other ...