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AQA GCSE Physics Question and answers verified to pass

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AQA GCSE Physics Question and answers verified to pass AQA GCSE Physics - Paper 1 Energy Stores - correct answer 1) Elastic potential 2) Gravitational potential 3) Thermal 4) Electrostatic 5) Nuclear 6) Chemical 7) Kinetic 8) Magnetic 9) Light 10) Sound How is energy transf...

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  • October 19, 2024
  • 34
  • 2024/2025
  • Exam (elaborations)
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AQA GCSE Physics - Paper 1
Energy Stores - correct answer ✔1) Elastic potential
2) Gravitational potential
3) Thermal
4) Electrostatic
5) Nuclear
6) Chemical
7) Kinetic
8) Magnetic
9) Light
10) Sound


How is energy transferred? - correct answer ✔1) Mechanically - force doing
work
2) Electrically - work done by moving charges
3) Heating/Radiation - light, sound


How can work be done? - correct answer ✔When a current flows or by a
force moving an object


Kinetic energy formula - correct answer ✔E=1/2mv²
Kinetic energy(J) = 0.5 x mass(kg) x speed²(m/s)


Gravitational potential energy formula - correct answer ✔E=mgh
G.P.E(J) = mass(kg) x gravitational field strength (N/kg) x height (m)

,What happens when an object falls and there's no air resistance? - correct
answer ✔Energy lost from the g.p.e store = energy gained in the kinetic
energy store


What does air resistance do when acting against falling objects? - correct
answer ✔It causes some energy to be transferred to other energy stores e.g.
the thermal energy stores of the object and the surroundings


Elastic potential energy formula - correct answer ✔E=1/2ke²
E.P.E(J) = 0.5 x spring constant(N/m) x extension²(m)


What is SHC? - correct answer ✔The amount of energy needed to raise the
temperature of 1kg of a substance by 1°C


SHC formula - correct answer ✔E=mcθ
Change in thermal energy(J) = mass(kg) x SHC(J/kg/°C) x temperature
change(°C)


What is the conservation of energy principle? - correct answer ✔Energy can
be transferred usefully, or stored or dissipated (wasted energy), but can never
be created or destroyed


What is power? - correct answer ✔The rate of energy transfer, or the rate of
doing work


What is 1W equal to? - correct answer ✔1J of energy transferred per second


Power Equation 1 - correct answer ✔E=Pt
Energy transferred(J) = power(W) x time(s)

,Power Equation 2 - correct answer ✔W=Pt
Work done(J) = power(W) x time(s)


What is conduction? - correct answer ✔The process where vibrating
particles transfer energy to neighbouring particles
Energy is transferred to thermal stores of the object - this energy is shared
across the kinetic energy stores


What is thermal conductivity? - correct answer ✔A measure of how quickly
energy is transferred through a material via conduction


What is convection? - correct answer ✔Where energetic particles move
away from hotter to cooler regions
Energy is transferred to the thermal energy stores of the object and is shared
across the kinetic stores


What do radiators create? - correct answer ✔Convection currents


Convection currents - process - correct answer ✔1) Energy is transferred
from the radiator to the nearby air particles by conduction
2) The air by the radiator becomes warmer and less dense as the particles
move quicker
3) The warm air rises and displaces the cooler air, which is then heated by the
radiator
4) The previously heated air transfers energy to the surroundings - the air
cools, becomes denser and sinks


What does lubrication do? - correct answer ✔Reduce frictional forces

, What does insulation do? - correct answer ✔Reduce the rate of energy
transfer by heating


Thermal insulation techniques - correct answer ✔1) Cavity walls - made up
of an inner and outer wall with an air gap in the middle - the air gap reduces
the amount of energy transferred by conduction through the walls
2) Cavity wall insulators - the air gap is filled with foam also reduces energy
transfer by convection in the wall cavity
3) Loft insulation - reduces convection currents being created in lofts
4) Double-glazed windows - air gap between two sheets of glass that prevent
energy transfer by conduction through the windows
5) Draught excluders - reduce energy transfers by convection around doors
and windows


How do you improve efficiency? - correct answer ✔1) Lubrication
2) Insulation
3) Making objects more streamlined


Efficiency - energy transfer equation - correct answer ✔Useful output energy
transfer divided by total input energy transfer


Efficiency - power equation - correct answer ✔Useful power output divided
by total power input


Is any device 100% efficienct? - correct answer ✔No


Where is wasted energy usually transferred? - correct answer ✔Thermal
energy stores

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