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AQA GCSE Physics 2020 Paper 1 Higher Tier Exam Paper Full Walkthrough

CeerazzleDazzle Physics・37 minutes read

The session focuses on solving a full GCSE physics paper, particularly the AQA GCSE physics higher tier paper 1 from 2020, covering topics like circuits, LED torches, hydroelectric power generation, climate change, nuclear energy, and gas versus coal-fired power stations. It also delves into calculations involving resistors in parallel, electric shocks, gas particle movement, and pressure changes with temperature.

Insights

  • The session focuses on solving a full GCSE physics paper, specifically the AQA GCSE physics higher tier paper 1 from 2020.
  • Instructions are given to attempt the paper independently and use the video for checking working and understanding the thinking process.

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Recent questions

  • How is the resistance of a filament lamp determined?

    By using the equation V = I x R.

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Summary

00:00

Solving GCSE Physics Paper 1 (2020)

  • The session focuses on solving a full GCSE physics paper, specifically the AQA GCSE physics higher tier paper 1 from 2020.
  • Instructions are given to attempt the paper independently and use the video for checking working and understanding the thinking process.
  • The first question involves setting up a circuit with an ammeter and voltmeter to investigate current and potential difference across a filament lamp.
  • A graph is provided to analyze the relationship between current and potential difference, including understanding the behavior of a filament lamp.
  • The equation relating current, potential difference, and resistance (V = I x R) is utilized to determine the resistance of the filament lamp.
  • The concept of zero error in an ammeter is explained as when it displays a reading when not connected to a circuit.
  • A question involves identifying the correct circuit diagram for an LED torch based on the flow of current through the diode.
  • Calculations are performed to determine the total charge and useful power output of the LED torch based on current and time values.
  • The reason why an LED torch does not work when cells are placed incorrectly is explained due to the high resistance of the diode in that direction.
  • The efficiency of an LED torch is calculated using the formula Efficiency = Useful power output / Total power input.
  • The text delves into hydroelectric power generation, including equations linking density, mass, volume, energy, power, and time, as well as analyzing electricity demand fluctuations and environmental advantages of gas-fired power stations over coal-fired ones.
  • A graph depicting electricity generation from coal and gas-fired power stations is analyzed to determine the percentage increase in electricity generated using gas-fired stations.
  • Environmental advantages of gas-fired power stations over coal-fired ones are discussed, focusing on reduced emissions and waste.
  • The mean surface temperature change over years is used to refute a student's disbelief in climate change, highlighting the consistent increase in temperature over a long period.

14:14

Thermistors, Radiation, Nuclear Fusion, and Energy

  • Figure 8 displays the resistance variations of thermistors A, B, C, and D with temperature.
  • Thermistor C is the most suitable for measuring sea surface temperature due to its significant change between 16 and 17 degrees Celsius.
  • Man-made sources of background radiation include CT scans and Fallout from nuclear weapons.
  • Nuclear fission in power stations utilizes nuclear fuel like Uranium or Plutonium.
  • Nuclear fission involves a neutron hitting a uranium nucleus, causing it to split into lighter nuclei, releasing energy and neutrons.
  • Nuclear fusion combines lighter nuclei to form a larger one, releasing energy due to the mass difference.
  • Radioactive waste from fusion power stations has a shorter Half-Life, reducing risks and monitoring needs.
  • Aqua shoot ride speed is determined by distance and time measurements.
  • Calculating the mass of a rider on a slide involves gravitational potential energy, height, and gravitational field strength.
  • Riders on a slide reach similar speeds due to conservation of energy, canceling out mass, and dependence on gravity and height.

29:43

"Electricity Resistance, Shock, Gas Pressure Relationships"

  • The investigation results show mean total resistance in ohms and number of resistors in parallel.
  • The student correctly identifies the inverse proportionality between the number of resistors in parallel and mean total resistance.
  • The student uses data from Figure 12 to demonstrate the inverse proportionality.
  • The constant value (K) remains the same when calculating resistance for different pairs of resistors.
  • Adding resistors in parallel decreases total resistance due to multiple paths for current flow.
  • Figure 13 depicts a main electricity lighting circuit in a house with a fault causing an electric shock.
  • The mean resistance of the person is calculated using voltage and current values.
  • A large potential difference between the live wire and the person causes an electric shock.
  • The maximum current a person can let go of depends on the frequency of electricity supply.
  • A higher frequency results in a higher maximum current a person can let go of, making it safer.
  • Movement of gas particles in a helium-filled balloon is random with varying speeds.
  • The new pressure in a compressed balloon is calculated using the initial pressure and volume.
  • Increasing temperature causes gas particles to gain kinetic energy, leading to more collisions with the walls and increased pressure.
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