EDEXCEL GCSE Combined Science Physics – Paper 2 Foundation Tier Predicted Paper 2023 with correct marking scheme

EDEXCEL GCSE Combined Science Physics – Paper 2 Foundation Tier Predicted Paper 2023 with correct marking scheme Name …………………………………………………………………… Date ………………… 1 hour 15 minutes allowed. You may use a calculator and an Edexcel equation sheet. Grade boundaries These are VERY rough guesses! Getting a 4 on this paper does not guarantee you the same mark in the exam. • 5-5 60% • 4-4 50% • 3-3 40% • 2-2 30% • 1-1 20% 01 a) Electricity in the UK is distributed by means of a “National Grid”. Use the words in the box to define the term “National Grid”. Not all the words will be used. [2 marks] A system of wires and that transmits from a power station to homes. b) State the approximate voltage and frequency at which mains electricity is distributed. Draw a line from the left value box to the corresponding unit box on the right. [4 marks] i. Voltage: draw one line only. 50 V 230 A 190 Hz ii. Frequency: draw one line only. 50 V 230 A 190 Hz c) In Britain, mains electricity plugs have a total of three wires. Describe and explain the wires and the other safety features of the plug. [5 marks] The yellow wire is the… The role of the yellow wire is to… The brown wire is the …. The role of the brown wire is to…. The blue wire is the… Other safety features include…. d) A student wanted to replace a fuse, the original fuse was a 3 amp, and the replacement was a 13 amp. A safe current for the device is 2 amps; if the resistance across the fuse is 2 calculate the potential difference. Use the equation potential difference = current x resistance [2 marks] Volts 02 a) Describe what happens when two like poles on a magnet are brought close together. [2 marks] Draw one line only. Pressure exerted Poles repel each other Force exerted Nothing happens Weight exerted Poles attract each other b) On the diagram of the bar magnet below, sketch the magnetic field lines. [2 marks] c) Describe how a magnetic compass works. [3 marks] 03 a) Select the circuit symbol for a diode. Tick one box only. [1 mark] b) Sketch the current/potential difference graph for a diode. [3 marks] c) Explain the shape of this graph. [3 marks] d) Give an example of a use for a diode and explain how it works. [2 marks] 04 A student carried out an experiment to find the spring constant of a spring. The table shows the data collected. Mass added (g) Mass (kg) [mass in g ÷ 1000] Length of spring (m) Weight ( ) Extension (m) 0 0.170 0 100 0.235 200 0.300 0.13 300 0.365 400 0.430 a) Complete the table to determine the values needed to plot a graph to find the spring constant. Use the equation: Weight = mass x gravity Use the value of 10 N/kg for gravity. [5 marks] b) There are two ways to determine the spring constant of a spring. From the data collected, give both methods. [2 marks] c) Draw a graph that will allow you to determine the spring constant. [4 marks] d) Select the best equation to calculate force. [1 mark] Force = mass × acceleration Force = spring constant x extension Pressure × volume = constant Distance = speed × time e) Determine the spring constant for this spring in N/m. [4 marks] f) Select how you could determine the work done when stretching this spring. [1 mark] Elastic potential energy = 0.5 x spring constant x (extension)2 Moment of a force = force × distance Work done = force × distance Force = mass × acceleration g) Thus, calculate the work done to stretch a spring 26cm