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18 Cards in this Set
- Front
- Back
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Specific charge
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The ratio of a particles charge to its mass
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Electron volt
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Unit if energy equivalent to 1.6x10^19J
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Ground state
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When electrons are in their lowest energy state
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Ionisation energy
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The energy required to remove an electron from an atom
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Photoelectricity
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The emission of electrons from a metal surface when it is illuminated with electromagnetic light
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Work function
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The minimum energy needed by an electron to escape from the surface
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Threshold frequency
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Te minimum frequency of photons for emission of electrons
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Wave particle duality
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Having both wave and particle like properties
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Isotopes
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Isotopes are the same elements with the same number of protons and different number of neutrons
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Hadrons
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Particles that experience the strong nuclear force
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Baryons
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Particles comprised of three quarks
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Mesons
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Particles comprised of a quark and antiquark
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Electrical current
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The rate of flow of electric charge
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Potential difference
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Work done per unit charge between two points
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Ohm's law
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The current flowing through a metal wire at a constant temperature is proportional to the p.d across it
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EMF
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Work done by the battery per unit charge or, the p.d across the terminals when no current is flowing
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Internal resistance
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The resistance of the materials within the battery
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Superconductor
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A material that has zero resistivity
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