AQA A level Physics Paper 1 EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS|GRADE
A+ ASSURED
Current - CORRECT ANSWER -Rate of flow of charge
Coulomb - CORRECT ANSWER -The amount of charge passing a point when a current of
1A flows for 1s
Potential difference - CORRECT ANSWER -The work done per unit charge in moving a
small point positive charge between two points
Threshold Voltage for a Diode - CORRECT ANSWER -The voltage at which a current will
begin to flow at, assumed to be +0.6V if not stated
Reverse Bias - CORRECT ANSWER -When very little currency can flow in the reverse
direction of a diode
Variable Resistor - CORRECT ANSWER -Can be used to change the current through a
circuit can also be called a rheostat
NTC Thermistor - CORRECT ANSWER -(A type of semiconductor) that has decreasing
resistance when its temperature increases - negative temperature coefficient
Transitional Temperature - CORRECT ANSWER -The critical temperature at and below
which a superconductor has zero resistivity
, Semiconductor - CORRECT 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 - CORRECT ANSWER -The ratio of a components potential difference to its
current
Volt - CORRECT 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 - CORRECT 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 - CORRECT ANSWER -A material that follows Ohm's law when physical
components remain the same
Diodes - CORRECT ANSWER -Components made from semi conductors that only allow
current to flow in one direction
Resistivity - CORRECT ANSWER -The resistance of a 1m length of wire with a 1m^2 cross
sectional area
Superconductor - CORRECT ANSWER -A material that has zero resistivity when it is
cooled below its critical temperature
Critical Temperature - CORRECT ANSWER -The temperature below which a material will
have zero resistance and will become a superconductor
Power - CORRECT ANSWER -The rate of transfer of energy
A+ ASSURED
Current - CORRECT ANSWER -Rate of flow of charge
Coulomb - CORRECT ANSWER -The amount of charge passing a point when a current of
1A flows for 1s
Potential difference - CORRECT ANSWER -The work done per unit charge in moving a
small point positive charge between two points
Threshold Voltage for a Diode - CORRECT ANSWER -The voltage at which a current will
begin to flow at, assumed to be +0.6V if not stated
Reverse Bias - CORRECT ANSWER -When very little currency can flow in the reverse
direction of a diode
Variable Resistor - CORRECT ANSWER -Can be used to change the current through a
circuit can also be called a rheostat
NTC Thermistor - CORRECT ANSWER -(A type of semiconductor) that has decreasing
resistance when its temperature increases - negative temperature coefficient
Transitional Temperature - CORRECT ANSWER -The critical temperature at and below
which a superconductor has zero resistivity
, Semiconductor - CORRECT 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 - CORRECT ANSWER -The ratio of a components potential difference to its
current
Volt - CORRECT 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 - CORRECT 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 - CORRECT ANSWER -A material that follows Ohm's law when physical
components remain the same
Diodes - CORRECT ANSWER -Components made from semi conductors that only allow
current to flow in one direction
Resistivity - CORRECT ANSWER -The resistance of a 1m length of wire with a 1m^2 cross
sectional area
Superconductor - CORRECT ANSWER -A material that has zero resistivity when it is
cooled below its critical temperature
Critical Temperature - CORRECT ANSWER -The temperature below which a material will
have zero resistance and will become a superconductor
Power - CORRECT ANSWER -The rate of transfer of energy
