AQA A level Physics Paper 1
With answers
Current - answer-Rate of flow of charge
Coulomb - answer-The amount of charge passing a point when a current of 1A flows for
1s
Potential difference - answer-The work done per unit charge in moving a small point
positive charge between two points
Threshold Voltage for a Diode - answer-The voltage at which a current will begin to flow
at, assumed to be +0.6V if not stated
Reverse Bias - answer-When very little currency can flow in the reverse direction of a
diode
Variable Resistor - answer-Can be used to change the current through a circuit can also
be called a rheostat
NTC Thermistor - answer-(A type of semiconductor) that has decreasing resistance
when its temperature increases - negative temperature coefficient
Transitional Temperature - answer-The critical temperature at and below which a
superconductor has zero resistivity
Semiconductor - answer-A group of materials which conduct electricity (not as well as
metals), when their temperature rises they can release more charge carriers and their
resistance decreases
Resistance - answer-The ratio of a components potential difference to its current
Volt - answer-The potential difference across a component when 1 joule of energy is
used to move a coulomb of charge through a component
Ohm's Law - answer-Provided that the physical conditions remain the same, the current
through an ohmic conductor is directly proportional to the potential difference across it
Ohmic conductor - answer-A material that follows Ohm's law when physical components
remain the same
, Diodes - answer-Components made from semi conductors that only allow current to
flow in one direction
Resistivity - answer-The resistance of a 1m length of wire with a 1m^2 cross sectional
area
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 particles. 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
With answers
Current - answer-Rate of flow of charge
Coulomb - answer-The amount of charge passing a point when a current of 1A flows for
1s
Potential difference - answer-The work done per unit charge in moving a small point
positive charge between two points
Threshold Voltage for a Diode - answer-The voltage at which a current will begin to flow
at, assumed to be +0.6V if not stated
Reverse Bias - answer-When very little currency can flow in the reverse direction of a
diode
Variable Resistor - answer-Can be used to change the current through a circuit can also
be called a rheostat
NTC Thermistor - answer-(A type of semiconductor) that has decreasing resistance
when its temperature increases - negative temperature coefficient
Transitional Temperature - answer-The critical temperature at and below which a
superconductor has zero resistivity
Semiconductor - answer-A group of materials which conduct electricity (not as well as
metals), when their temperature rises they can release more charge carriers and their
resistance decreases
Resistance - answer-The ratio of a components potential difference to its current
Volt - answer-The potential difference across a component when 1 joule of energy is
used to move a coulomb of charge through a component
Ohm's Law - answer-Provided that the physical conditions remain the same, the current
through an ohmic conductor is directly proportional to the potential difference across it
Ohmic conductor - answer-A material that follows Ohm's law when physical components
remain the same
, Diodes - answer-Components made from semi conductors that only allow current to
flow in one direction
Resistivity - answer-The resistance of a 1m length of wire with a 1m^2 cross sectional
area
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 particles. 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
