COMPLETE EXAM PRACTICE WITH MARK
SCHEME
◉ Superconductor. Answer: A material that has zero resistivity when
it is cooled below its critical temperature
◉ Critical Temperature. Answer: The temperature below which a
material will have zero resistance and will become a superconductor
◉ Power. Answer: The rate of transfer of energy
◉ EMF. Answer: The work done in moving a unit charge through a
battery
◉ Lost Volts. Answer: Work done per unit charge in overcoming the
internal resistance within a battery
◉ Terminal PD. Answer: The potential difference between the two
terminals of the power supply
,◉ Potential Divider. Answer: A circuit with a constant voltage source
and more than one resistor connected in series that can be used to
vary the output voltage
◉ Threshold Frequency. Answer: The minimum frequency that must
be incident on the surface of a metal for the emission of
photoelectrons to occur
◉ Electromagnetic Force. Answer: A fundamental force that causes
interactions between charged particules. Virtual photons are the
exchange particles
◉ Gravitational Force. Answer: A fundamental force which causes
attraction between objects with a force proportional to their mass
◉ Strong Nuclear Force. Answer: A fundamental force with a short
range which is attractive between 0.5-3 fm and repulsive between 0-
0.5fm
◉ Alpha Decay. Answer: Occurs in nuclei of 82 protons or more that
consists of an alpha particle being emitted
◉ Photons. Answer: Virtual particles that are discrete packets of
energy
, ◉ Antiparticle. Answer: Opposite in charge to the particle but have
the same rest mass and rest energy
◉ PET Scan. Answer: Positron Emission Tomography
◉ Rest Energy. Answer: The amount of energy that would be
produced if all of a particle's mass was transformed into energy
◉ Fundamental Particle. Answer: A particle that cannot be split up
into smaller particles
◉ Stopping Potential. Answer: The work done by the potential
difference in stopping the fastest moving electrons
◉ Electron Volt. Answer: The kinetic energy that an electron has
after being accelerated from rest through a potential difference of 1
volt
◉ 1 eV =. Answer: 1.6x10^-19 Joules
◉ Ground State. Answer: The lowest energy level that an electron
can occupy in an atom (n=1)