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41 Cards in this Set
- Front
- Back
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Acceleration |
The rate of change in velocity, measured in metres per second |
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Amplitude |
Maximum displacement of a waves from its rest point |
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Archimedes principle |
The upward buoyant force (upthrust) exerted on an object immersed in a fluid whether fully or partially submerged is equal to the weight of the fluid that it displaces |
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Brittle |
A material that breaks with little or no Plastic deformation |
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Coherence |
Two waves with a constant phase relationship |
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Couple |
Two forces that ate equal and opposite to rebirth but not in the same straight line |
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Density |
Mass per unit volume |
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Drift velocity |
The average speed of an election as it travels though a wire |
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Ductile |
Can be drawn in to wires and shows plastic deformation before under tensile stress |
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Elastic deformation |
A material will return to shape when deforming force is removed |
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Current |
Rate of flow of charge |
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Electro magnetic wave |
Transverse Wave that doesn't require a medium |
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E.M.F |
Energy gained per unit charge, when a form of energy is transferred in to electric energy |
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Electron volt |
Kinetic energy gained by an election when it is accelerated through 1 V |
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First harmonic |
The length of the song is half the wavelength, produces the lowest possible frequency |
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Frequency |
Number of occasions per unit time. HZ |
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Hooks law |
The extension of an object is proportional to the force applied, provided elastic limit is not exceed |
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Intensity |
The rate at which energy is transferred from one location to another, power per unit area |
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Kirchhoffs first law |
The sum of current entering a junction is equal to the current leading the junction |
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Krichhoffs second law |
The sum of the e.m.f is equal to the sum of the p.d in a closed loop |
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Longitudinal wave |
A wave where the oscillations are parallel to the direction of travel (sound) |
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Microwaves |
Electromagnetic wave with wavelengths between x10-4 and x10-1 |
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Moment of a force |
The product of a force and the perpendicular distance from its pivot |
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Ohms law |
The current through a conductor its directly proportional to the p.d. If temperature is constant |
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Period |
Tone taken for a wave to complete one oscillation |
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Phase difference |
The strange in which one wave follows another. Measured in degrees or radians |
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Plane polarised |
Transverse Wave only oscillating in one plane |
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Plastic deformation |
A material will not return to original shape once deforming force is removed |
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P.d |
Measurement across a component is the energy transferred per unit charge |
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Power |
Rate of work being done, W |
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Principal of moments |
For an object to be in equilibrium, sum of clockwise force is equal to anti clockwise force and no net force on the object |
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Resistance |
A property of a component that regulates electric current passing through it |
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Speed |
Distance traveled per unit time |
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Spring constant |
Force per unit extension |
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Strain |
Extension per unit length |
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Stress |
Force per cross sectional area |
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Transverse waves |
A waves where the oscillations are perpendicular to direction of travel |
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Wave |
Series of vibrations that transfer energy from one place to another |
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Work function |
Minimum Energy required to to release a election from a metals surface, to overcome the electro static force |
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Youngs modulus |
Ratio between stress and strain |
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Watt |
Unit of power |
