AQA GCSE Physics 2020 Paper 1 Higher Tier Exam Paper Full Walkthrough CeerazzleDazzle Physics・2 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. Get key ideas from YouTube videos. It’s free 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.