Flashcards
Particles, Phenomena & Electricity Definitions
Flashcards do conjunto (21)
- 1IonsCharged particles which have either lost or gained electrons.
- 2Specific ChargeThe ratio of charge to mass.
- 3Electrostatic ForceThe nuclear force which repels protons which are within certain ranges of each other.
- 4Strong Nuclear ForceAttracts and repels nucleons, dependant upon separation; repels below 0.5fm, attracts between 0.5 and 0.75fm. and isn't felt past 4fm.
- 5Alpha DecayOccurs in large nuclei; 2 protons and 2 neutrons are lost.
(An alpha particle is emitted) - 6Beta-Negative DecayOccurs in neutron-rich nuclei; a neutron becomes a proton.
(An electron & antineutrino are emitted). - 7Beta DecayOccurs in proton-rich nuclei; a proton becomes a neutron.
(A positron & neutrino are emitted). - 8Gamma DecayOccurs after another decay; excess energy is emitted as a photon.
- 9AnnhilationA particle and its antiparticle collide and release energy in the form of two photons.
- 10Pair ProductionA photon releases a particle and its antiparticle.
(Usually a proton or electron due to low rest energy). - 11IsotopeA variation of an atom where there is a different number of neutrons.
- 12Electromagnetic WavesAre composed of an electric and magnetic field, which vibrate in phase and at 90° to each other - as well as the direction of travel.
- 13PhotonA packet of electromagnetic energy.
- 14IonisationThe increase (negative ion) or decrease (positive ion) in the electrons of an atom.
- 15CurrentA flow of charged particles.
- 16Potential DifferenceThe work done per unit charge.
- 17A CoulombThe amount of charge that passes a point when a current of 1A flows for 1s.
- 18SuperconductersHave zero resistance below a critical temperature.
- 19EMF(The Electromotive Force)
is the energy provided per coulomb passing through a source. - 20Potential DividersTwo or more resistors in series,
with a fixed PD. - 21Ohm's LawThe current through a circuit is proportional to the PD, provided physical conditions remain the same.
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- AS level Physics (Particles & Electricity) FlashCards sobre Particles, Phenomena & Electricity Definitions, criado por Lauren Blood em 09-03-2017.
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- Lauren Blood
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