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A-Level Physics: AQA Year 1 & 2 Exam Practice Workbook - includes Answers: superb for the 2024 and 2025 exams (CGP AQA A-Level Physics)

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Name the charge carriers responsible for the current in a: a metal b salt solution that conducts electricity.

Electrical power and energy This exercise provides practice in using several electrical formulae for power. Scientists record a video of the bee as it lands and analyse the video to determine the height to which the ball swings. By comparing a specific equation to this ‘standard equation’, you can deduce a great deal of information about the motion of an oscillating mass. d Determine the density of the hydrogen and hence deduce the root mean square (rms) speed of the hydrogen molecules at 100 °C. g If the frequency of an oscillation increases, state whether its period increases, decreases or stays the same.d State the distance in centimetres between a node and the nearest antinode and compare this distance with the wavelength λ of the progressive wave. Our Revision Workbooks are designed to help students develop vital skills throughout the course and build their confidence in preparation for the exam, with guided questions, unguided questions, practice papers and a full set of answers. if a cell produces a current in the opposite direction to the current you have drawn around the loop. m The gravitational potential ϕ in the field of a point mass is given by φ = − GM r a State the meaning of each of the symbols G, M and r.

To obtain satisfactory measurements of the extension of the wire, it should be several metres in length. b The current direction is changed so that current enters the top face of the film and leaves by the lower face. c The aircraft flies in a direction such that the wind is blowing at it sideways (in other words, at 90°). Two horizontal forces act on the ship: the forward thrust provided by its engines and the backward drag force of the water. Referring to these forces, explain how her velocity can be increasing while her acceleration is decreasing.Gravitational field strength The idea of gravitational field strength g is familiar because we use the quantity g to calculate the weight W of an object of mass m, using W = mg. State whether the pressure of the air would be greater or less than the value you have calculated in part g. The change in pressure Δp if you move up or down in a fluid is given by: Δp = ρ gΔh where Δh is the change in depth.

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