G482 Definitions 4.5 / 5 based on 5 ratings ? PhysicsASOCR Created by: rebeccaCreated on: 21-04-13 17:51 Define The Coulomb The amount of charge transferred by a current of one amp in one second 1 of 22 Define Potential Difference Energy transfer per unit charge from electrical to other forms 2 of 22 Define the Volt one joule per coulomb 3 of 22 Define Electromotive Force Energy gained per unit of charges passing through a supply. Measure in V of JC^-1 4 of 22 Define Resistance Potential difference/ current 5 of 22 Define the Ohm The resistance of a component when a potential difference of one volt is produced per ampere of current 6 of 22 Define Resistivity The product of the resistance and cross sectional area divided by the length P=RA/L 7 of 22 Define the Kilowatt Hour A unit of energy equal to 36MJ or 1KW for 1h 8 of 22 Define Displacement Distance from the mean position expressed as a vector 9 of 22 Define Amplitude Maximum displacement 10 of 22 Define Wavelength Distance between neighbouring identical points 11 of 22 Define Peroid Time taken for one complete oscillation of a particle 12 of 22 Define Phase Difference The fraction of a cycle between the oscillations of two particles 13 of 22 Define Frequency Number of wave passing a point per unit time 14 of 22 Define Speed Distance travelled by a wave per unit time 15 of 22 Define a Node When the amplitude is always zero 16 of 22 Define Antinode When the amplitude is always as its maximum possible value 17 of 22 Define Fundamental mode The simplest pattern of movement and has the lowest possible frequency band and the longest wavelength 18 of 22 Define Harmonics Different modes of vibration of a wave with increasing frequency and decreasing wavelength 19 of 22 Define the Electron Volt Energy acquired by an electron accelerated through a p.d. of 1V 20 of 22 Define Work Function The minimum energy required to release an electron form the surface of a material 21 of 22 Define Threshold Frequency Frequency of a photon that will just emit an electron from a substance without any kinetic energy 22 of 22

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