AQA A level Physics Paper 1 Questions & Answers(RATED A+)
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AQA A level Physics Paper 1
Institution
AQA A Level Physics Paper 1
Current - ANSWERRate of flow of charge
Coulomb - ANSWERThe amount of charge passing a point when a current of 1A flows for 1s
Potential difference - ANSWERThe work done per unit charge in moving a small point positive charge between two points
Threshold Voltage for a Diode - ANSWERThe volt...
AQA A level Physics Paper 1 Questions
& Answers(RATED A+)
Current - ANSWERRate of flow of charge
Coulomb - ANSWERThe amount of charge passing a point when a current of 1A flows for 1s
Potential difference - ANSWERThe work done per unit charge in moving a small point positive charge between two points
Threshold Voltage for a Diode - ANSWERThe voltage at which a current will begin to
flow at, assumed to be +0.6V if not stated
Reverse Bias - ANSWERWhen very little currency can flow in the reverse direction of a diode
Variable Resistor - ANSWERCan 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 - ANSWERThe critical temperature at and below which a superconductor has zero resistivity
Semiconductor - ANSWERA 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 - ANSWERThe ratio of a components potential difference to its current
Volt - ANSWERThe potential difference across a component when 1 joule of energy is used to move a coulomb of charge through a component
Ohm's Law - ANSWERProvided that the physical conditions remain the same, the current through an ohmic conductor is directly proportional to the potential difference across it
Ohmic conductor - ANSWERA material that follows Ohm's law when physical components remain the same
Diodes - ANSWERComponents made from semi conductors that only allow current to flow in one direction
Resistivity - ANSWERThe resistance of a 1m length of wire with a 1m^2 cross sectional area Superconductor - ANSWERA material that has zero resistivity when it is cooled below its critical temperature
Critical Temperature - ANSWERThe temperature below which a material will have zero resistance and will become a superconductor
Power - ANSWERThe rate of transfer of energy
EMF - ANSWERThe work done in moving a unit charge through a battery
Lost Volts - ANSWERWork done per unit charge in overcoming the internal resistance within a battery
Terminal PD - ANSWERThe potential difference between the two terminals of the power supply
Potential Divider - ANSWERA 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 - ANSWERThe minimum frequency that must be incident on the surface of a metal for the emission of photoelectrons to occur
Electromagnetic Force - ANSWERA fundamental force that causes interactions between charged particules. Virtual photons are the exchange particles
Gravitational Force - ANSWERA fundamental force which causes attraction between
objects with a force proportional to their mass
Strong Nuclear Force - ANSWERA fundamental force with a short range which is attractive between 0.5-3 fm and repulsive between 0-0.5fm
Alpha Decay - ANSWEROccurs in nuclei of 82 protons or more that consists of an alpha particle being emitted
Photons - ANSWERVirtual particles that are discrete packets of energy
Antiparticle - ANSWEROpposite in charge to the particle but have the same rest mass and rest energy
PET Scan - ANSWERPositron Emission Tomography
Rest Energy - ANSWERThe amount of energy that would be produced if all of a particle's mass was transformed into energy
Fundamental Particle - ANSWERA particle that cannot be split up into smaller particles
Stopping Potential - ANSWERThe work done by the potential difference in stopping the fastest moving electrons
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