, AQA A LEVEL PHYSICS PAPER 1 EXAM
QUESTIONS AND ANSWERS 100%
CORRECT (GRADED A+)
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
QUESTIONS AND ANSWERS 100%
CORRECT (GRADED A+)
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
