AQA AS-Level Physics Definitions Questions And Answers Updated 2024.pdf

AQA AS-Level Physics Definitions
Questions And Answers Updated
2024/2025
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, Electric Current - with answers:The rate of flow of charge.


Potential Difference - with answers:The work done per unit charge.


Resistance - with answers:Potential difference across it / current through it.


Ohm's Law - with answers:Current is proportional to potential difference as long as the
temperature is constant.


EMF - with answers:The electrical energy supplied per unit charge passing through it.


Work Function - with answers:The minimum energy required to release an electron from the
surface of a metal.


Threshold Frequency - with answers:The minimum frequency of radiation required to release an
electron from the surface of a metal.


Electron Volt - with answers:The energy gained by an electron when it is accelerated through a
potential difference of 1 volt.


Specific Charge - with answers:Charge / Mass. The ratio of charge to mass.


Isotope - with answers:An element with the same number of protons but a different number of
neutrons.


Ionisation Energy - with answers:The minimum energy required to take an electron from the
ground state to completely free of the atom.


Density - with answers:Mass per unit volume of a material.