AQA Physics Paper 1 Updated Question and Answer | 100% Correct Solutions | Grade A+

AQA Physics Paper 1 Updated Question and
Answer | 100% Correct Solutions | Grade A+
• 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

, • EMF . CORRECT ANSWER: The work done in moving a unit charge through a
battery


• Lost Volts . CORRECT ANSWER: Work done per unit charge in overcoming the
internal resistance within a battery


• Terminal PD . CORRECT ANSWER: The potential difference between the two
terminals of the power supply


• Potential Divider . CORRECT 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 . CORRECT ANSWER: The minimum frequency that must
be incident on the surface of a metal for the emission of photoelectrons to occur


• Electromagnetic Force . CORRECT ANSWER: A fundamental force that causes
interactions between charged particules. Virtual photons are the exchange
particles


• Gravitational Force . CORRECT ANSWER: A fundamental force which causes
attraction between objects with a force proportional to their mass


• Strong Nuclear Force . CORRECT ANSWER: A fundamental force with a short
range which is attractive between 0.5-3 fm and repulsive between 0-0.5fm