Physics Revision Flashcards
How do you find out random uncertainty?
(Max reading - minimum reading) divided by number of readings
What is an electric field?
A region of space in which a charged particle can experience a force without being in contact with another object
What is 1 volt?
1 joule of energy supplied to each coulomb of charge
What is the electro motive force?
The energy supplied to each coulomb of charge by a source of electrical energy. (Max volts from a cell when no current)
What is lost volts?
The voltage across the internal resistance of a cell
What is a.c?
Alternating current, repeatedly changes directly. Voltage changes in magnitude
What is d.c
Direct current, charge flows in one direction from negative to positive. Voltage is a constant magnitude
What is capacitance?
The measure of charge stored per volt
What is the photoelectric effect?
When electrons are ejected from a surface of metal due to radiation being above a certain frequency
What is threshold frequency?
The minimum frequency required to eject electrons from a surface of metal
What is work function?
The minimum energy required for a metal to remove excess electrons from its surface
What is constructive interference?
When the waves from two sources meet and a point perfectly in phase
What is destructive interference?
When the waves from two sources meet at a point perfectly out of phase
What is the absolute refractive index?
The ratio of the speed of light in a vacuum to the speed of light in a material
What is the critical angle?
The angle of incidence that results in an angle of refraction of 90 degrees to the normal
What is irradiance?
The power of radiation per square meter, incident on a surface
What is the line spectrum?
The spectrum produced by the electrons in a particular element falling to lower energy levels and emitting photons of light
Describe the Bohr model
Nucleus made of protons and neutrons with electrons orbiting it in energy levels
What is a hadron?
A particle composed of quarks
What is a baryon?
A type of hadron, composed of three quarks
What is a meson?
A type of hadron, composed of two quarks
What is a boson?
A force meditation particle
What is a fermion?
A fundamental particle which is responsible for mass
What is an anti particle?
Same mass but opposite charge from its corresponding particle
