AQA A Level Physics 1 Exam with Questions and Answers – 100% Solved
A particle that moves uniformly in a circular path is accelerating yet moving at a constant speed.
Explain this statement by reference to the physical principles involved (4) - ✔✔✔-speed scalar
velocity vector (1) direction changes continuously (1) velocity changes (1) acceleration is rate of
change of velocity
Advantage of using a stranded cable rather than a solid cable of the same cross-sectional area -
✔✔✔-larger surface area so better heat dissipation
conditions for equilibrium - ✔✔✔-resultant force is 0 (1) resultant torque is 0 (1)
define center of gravity - ✔✔✔-the point in a body (1) where the weight of an object appears to
act (1)
define center of mass - ✔✔✔-the point in the body through which the mass appears to act
define density of a material - ✔✔✔-mass per unit volume
define hookes law - ✔✔✔-Extension is proportional to the applied force up to limit of
proportionality (1)
as long as extension is small (1)
define moment of a force (2) - ✔✔✔-force x perpendicular distance around a pivot (1) between
force and pivot (2)
define potential difference - ✔✔✔-work done per unit charge
define yield stress of a material - ✔✔✔-force per unit area (1) at which material permanently
deformed (1) for no/small increase in force
, AQA A Level Physics 1 Exam with Questions and Answers – 100% Solved
definition of elastic limit - ✔✔✔-maximum force/load which can be applied to the object
without it being permanently deformed
describe what is meant by the period of an oscilation - ✔✔✔-time taken for one complete
oscillation
difference between scalar and vector - ✔✔✔-vector has magnitude and direction scalar only
has magnitude
Effect on diffraction pattern when wavelength decreases (3) - ✔✔✔-Maxima closer together (1)
angle decreases (1) smaller path difference (1)
example of non-ohmic conductor - ✔✔✔-filament lamp/LDR/thermistor
Explain how (bright ring) diagram is evidence of the wave-particle duality of electrons? - ✔✔✔-
Diffraction pattern maxima/minima (bright and dark areas) (1)
Diffraction is a property of waves- proves wave-behaviour of electrons (1)
Explain how excitation takes place in a fluorescent tube - ✔✔✔-Electrons flow through the tube
to the applied PD causing a current to flow (1)
Electrons collide with mercury atoms in the tube (1)
This raises electrons in the mercury atom to a higher energy level (1)
Explain the difference between excitation and ionisation (2) - ✔✔✔-An electron receives a
discrete amount of energy for BOTH (1)
Excitation promotes an electron to a higher energy level
Ionisation is when an electron receives enough energy to leave the atom
A particle that moves uniformly in a circular path is accelerating yet moving at a constant speed.
Explain this statement by reference to the physical principles involved (4) - ✔✔✔-speed scalar
velocity vector (1) direction changes continuously (1) velocity changes (1) acceleration is rate of
change of velocity
Advantage of using a stranded cable rather than a solid cable of the same cross-sectional area -
✔✔✔-larger surface area so better heat dissipation
conditions for equilibrium - ✔✔✔-resultant force is 0 (1) resultant torque is 0 (1)
define center of gravity - ✔✔✔-the point in a body (1) where the weight of an object appears to
act (1)
define center of mass - ✔✔✔-the point in the body through which the mass appears to act
define density of a material - ✔✔✔-mass per unit volume
define hookes law - ✔✔✔-Extension is proportional to the applied force up to limit of
proportionality (1)
as long as extension is small (1)
define moment of a force (2) - ✔✔✔-force x perpendicular distance around a pivot (1) between
force and pivot (2)
define potential difference - ✔✔✔-work done per unit charge
define yield stress of a material - ✔✔✔-force per unit area (1) at which material permanently
deformed (1) for no/small increase in force
, AQA A Level Physics 1 Exam with Questions and Answers – 100% Solved
definition of elastic limit - ✔✔✔-maximum force/load which can be applied to the object
without it being permanently deformed
describe what is meant by the period of an oscilation - ✔✔✔-time taken for one complete
oscillation
difference between scalar and vector - ✔✔✔-vector has magnitude and direction scalar only
has magnitude
Effect on diffraction pattern when wavelength decreases (3) - ✔✔✔-Maxima closer together (1)
angle decreases (1) smaller path difference (1)
example of non-ohmic conductor - ✔✔✔-filament lamp/LDR/thermistor
Explain how (bright ring) diagram is evidence of the wave-particle duality of electrons? - ✔✔✔-
Diffraction pattern maxima/minima (bright and dark areas) (1)
Diffraction is a property of waves- proves wave-behaviour of electrons (1)
Explain how excitation takes place in a fluorescent tube - ✔✔✔-Electrons flow through the tube
to the applied PD causing a current to flow (1)
Electrons collide with mercury atoms in the tube (1)
This raises electrons in the mercury atom to a higher energy level (1)
Explain the difference between excitation and ionisation (2) - ✔✔✔-An electron receives a
discrete amount of energy for BOTH (1)
Excitation promotes an electron to a higher energy level
Ionisation is when an electron receives enough energy to leave the atom
