Author: misamaliraza94
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Kilovolt-amp (kVA)
kVA is kilo-volt-ampere. kVA is a unit of apparent power, which is electrical power unit. 1 kilo-volt-ampere is equal to 1000 volt-ampere: 1kVA = 1000VA 1 kilo-volt-ampere is equal to 1000 times 1 volt times 1 ampere: 1kVA = 1000⋅1V⋅1A kVA to volt-amps calculation The apparent power S in volt-amps (VA) is equal to 1000…
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Farad (F)
Farad is the unit of capacitance. It is named after Michael Faraday. The farad measures how much electric charge is accumulated on the capacitor. 1 farad is the capacitance of a capacitor that has charge of 1 coulomb when applied voltage drop of 1 volt. 1F = 1C / 1V Table of capacitance values in Farad…
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What is a decibel (dB)?
Decibel (dB) definition Decibel (Symbol: dB) is a logarithmic unit that indicates ratio or gain. Decibel is used to indicate the level of acoustic waves and electronic signals. The logarithmic scale can describe very big or very small numbers with shorter notation. The dB level can be viewed as relative gain of one level vs.…
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Decibel-Watt (dBW)
dBW definition dBW or decibel-watt is a unit of power in decibel scale, referenced to 1 watt (W). The power in decibel-watts (P(dBW)) is equal to 10 times base 10 logarithm of the power in watts (P(W)): P(dBW) = 10 ⋅ log10( P(W) / 1W) The power in watts (P(W)) is equal to 10 raised by the power in decibel-watts (P(dBW)) divided…
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Decibel-milliwatt (dBm)
dBm definition dBm or decibel-milliwatt is an electrical power unit in decibels (dB), referenced to 1 milliwatt (mW). The power in decibel-milliwatts (P(dBm)) is equal to 10 times base 10 logarithm of the power in milliwatts (P(mW)): P(dBm) = 10 ⋅ log10( P(mW) / 1mW) The power in milliwatts (P(mW)) is equal to 1mW times 10 raised by the power in…
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Ampere unit
Ampere definition Ampere or amp (symbol: A) is the unit of electrical current. The Ampere unit is named after Andre-Marie Ampere, from France. One Ampere is defined as the current that flows with electric charge of one Coulomb per second. 1 A = 1 C/s Amperemeter Ampere meter or ammeter is an electrical instrument that…
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Power Factor
In AC circuits, the power factor is the ratio of the real power that is used to do work and the apparent power that is supplied to the circuit. The power factor can get values in the range from 0 to 1. When all the power is reactive power with no real power (usually inductive load) – the power…
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Electric Power Efficiency
Power efficiency Power efficiency is defined as the ratio of the output power divided by the input power: η = 100% ⋅ Pout / Pin η is the efficiency in percent (%). Pin is the input power consumption in watts (W). Pout is the output power or actual work in watts (W). Example Electric motor has input power consumption of 50 watts. The motor was…
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Electric Charge
What is electric charge? Electric charge generates electric field. The electric charge influence other electric charges with electric force and influenced by the other charges with the same force in the opposite direction. There are 2 types of electric charge: Positive charge (+) Positive charge has more protons than electrons (Np>Ne). Positive charge is denoted…
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Electric Power
Electric power definition The electric power P is equal to the energy consumption E divided by the consumption time t: P is the electric power in watt (W). E is the energy consumption in joule (J). t is the time in seconds (s). Example Find the electric power of an electrical circuit that consumes 120…