er by magnetic couplings on their bumpers.","difficulty":6,"difficultyBand":"medium","totalMarks":3,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"ac12e5da-c4a8-47f6-8f89-313a2b4a5ae7","label":null,"content":"Devise an experiment to investigate the horizontal force needed to separate the two toy cars.","markscheme":"- Secures/clamps one of the toy cars to the bench so that it remains stationary M1\n- Connects a Newtonmeter (spring balance) horizontally to the second, free car OR connects a string from the second car over a pulley to a mass hanger M1\n- Pulls the Newtonmeter horizontally, increasing the force gradually, and records the maximum force reading at the exact instant of separation OR adds masses gradually until separation, records the mass, and calculates force using $F = mg$ A1","marks":3,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"25aa9f71-5f44-4ec5-8406-c7443a306b3a","revisionId":"b3e27968-da00-4fb0-8e53-000b02947fa0","questionNumber":null,"questionType":"LA","specification":"","difficulty":5,"difficultyBand":"medium","totalMarks":4,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"c4947066-504c-4271-94bf-5e81f4f57539","label":null,"content":"A student suggests that stacking multiple identical disc magnets together will create a magnetic field that is stronger than the field of a single disc magnet. The student is provided with a wooden ruler, a small steel paperclip, and five identical disc magnets. Describe a method the student could use to test this hypothesis.","markscheme":"- Describes a method of detection: places the paperclip at one end of the ruler and slowly moves the magnet(s) towards it (or vice versa) M1\n- Describes the measurement: uses the ruler to measure and record the maximum distance at which the paperclip is attracted to the magnet(s) M1\n- Varies the independent variable: repeats the experiment by increasing the number of magnets stacked together from 1 up to 5 magnets M1\n- Controls variables (e.g. using the same paperclip / keeping orientation of magnets consistent) OR states that measurements must be repeated to calculate a mean distance A1","marks":4,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"distance_test","label":"Measure attraction distance","steps":[{"type":"text","order":0,"title":"Keep it fair","content":"Use the same steel paperclip throughout, and keep every magnet stack in the same orientation. This earns the control-variable mark (A1).","highlights":[{"text":"a small steel paperclip, and five identical disc magnets","location":"specification"}]},{"type":"text","order":1,"title":"Find the attraction limit","content":"Put the paperclip at one end of the wooden ruler. Begin with **one magnet** and slowly move it along the ruler towards the paperclip.\n\nStop at the greatest separation where the paperclip is just attracted to the magnet. This detection method earns M1.","highlights":[{"text":"stacking multiple identical disc magnets together","location":"specification"}]},{"type":"text","order":2,"title":"Measure the reach","content":"Use the ruler to measure and record the greatest distance at which the paperclip is attracted. Always measure from the paperclip to the **nearest face of the magnet stack** — the face facing the paperclip — so the reference point stays the same as more magnets are added.\n\nMeasuring and recording the maximum attraction distance using the ruler earns M1.","highlights":[{"text":"a wooden ruler","location":"specification"}]},{"type":"text","order":3,"title":"Change magnet number","content":"Repeat the measurement for stacks of **two, three, four and five** magnets, keeping the orientation and paperclip the same. Record the maximum attraction distance for each stack.\n\nChanging the number of stacked magnets from 1 to 5 earns M1. Compare the recorded distances: if they increase as more magnets are stacked, the results

Magnets and magnetic fields

Question 7

Magnets and magnetic fields Questions

Magnets and magnetic fields

Question 7

Magnets and magnetic fields Questions