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G482 Definitions
Fichas del conjunto (48)
- 1HarmonicsStationary waves for a particular system with higher frequencies than the fundamental
- 2Conventional CurrentDirection is from positive to negative
- 3Kirchoff's 1st LawThe sum of the current entering any point in a circuit is equal to the sum of the currents leaving that same point
- 4Kirchoff's 2nd LawThe sum of the e.m.f.s round a loop in a circuit is equal to the sum of the p.d.s in that same loop
- 5PowerThe rate of energy transfer
- 6ReflectionThe bouncing back of a wave from a surface
- 7RefractionThe change in direction of a wave as it crosses an interface between two materials where its speed changes
- 8DiffractionThe spreading of a wave when it passes through a gap or past the edge of an object
- 9Wavelength of Radio Wavesx10^1
- 10Wavelength of Microwavesx10^-2
- 11Wavelength of Infra-Red Radiationx10^-5
- 12Wavelength of Visible Light4x10^-7 to 7x10^-7
- 13Wavelength of Ultra-Violet Radiationx10^-8
- 14Wavelength of X-Raysx10^-11
- 15Wavelength of Gamma Radiationx10^-11
- 16Plane Polarised waveA transverse wave that oscillates in only one plane
- 17Constructive interferenceWhen two or more waves meet in phase; the amplitudes add
- 18Destructive interferenceWhen two or more waves meet in anti-phase; the amplitudes subtract
- 19AmplitudeThe maximum displacement of any point on a wave from its equilibrium position
- 20WavelengthThe smallest distance from a point on a wave and a similar point on the next wave
- 21Period of a waveThe time taken for one complete oscillation of a point on a wave
- 22FrequencyThe number of oscillations per unit time of any point
- 23Electron-volt1 eV is the energy change of an electron when it moves through a potential difference of 1 volt
- 24Work FunctionThe minimum energy required to release an electron from the surface of a metal
- 25Threshold FrequencyThe minimum frequency of electromagnetic radiation required to release an electron from the surface of a metal
- 26Mean Drift VelocityThe average velocity of a charge carrier as it travels through a medium due to a potential difference
- 27Ohm's LawThe current through a conductor is proportional to the potential difference across it at a constant temperature
- 28DisplacementThe distance any part of the wave has moved from its mean position
- 29Phase DifferenceAngular difference by which one wave or particle leads or lags behind another
- 30Speed of a waveThe distance moved by the wave per unit time
- 31CoherantWaves with a constant phase difference (same frequency)
- 32Fundamental mode of vibrationThe lowest frequency stationary wave for a particular system
- 33Electric CurrentNet movement of charge
- 34Coulomb1C is the charge transferred in 1 second by a current of 1 amp
- 35Potential Difference (P.D)The electrical energy transferred per unit charge when electrical energy is converted into another form of energy
- 36Electromotive Force (e.m.f)The energy transferred per unit charge when another type of energy is converted into electrical energy
- 37Volt1V is 1 joule per coulomb
- 38ResistanceResistance is the potential difference per unit current
- 39Ohm1 ohm is the resistance when 1 volt of potential difference produces 1 ampere of current
- 40ResistivityResistivity = (Resistance x cross sectional area) / Length
- 41Kilowatt-hour1 kWh is the energy transferred by a 1 kW device in a time of 1 hour
- 42Terminal p.dThe potential difference across the total external resistance connected to an e.m.f. surface
- 43Progressive waveA wave that carries energy from one place to another
- 44Transverse waveA wave in which the direction of oscillation is perpendicular to the direction of travel of the wave
- 45Longitudinal waveA wave in which the particles oscillate parallel to the direction of travel of the wave
- 46NodeA point on a stationary wave where the amplitude is zero
- 47Anti-nodeA point on a stationary wave where the amplitude is a maximum
- 48Principle of SuperpositionWhen two or more waves of the same type are in the same place at the same time, the resultant displacement is the sum of the displacements of the individual waves
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- Physics Fichas sobre G482 Definitions, creado por aidenwh el 03/06/2013.
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