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10.1 What phenomenon is illustrated in the diagram above? 10.1.2 If the speed at which the magnet is moved in and out of the coil is increased, a greater deflection of the needle is observed - NSC Technical Sciences - Question 10 - 2021 - Paper 1
Question 10
10.1 What phenomenon is illustrated in the diagram above? 10.1.2 If the speed at which the magnet is moved in and out of the coil is increased, a greater deflection... show full transcript
Worked Solution & Example Answer:10.1 What phenomenon is illustrated in the diagram above? 10.1.2 If the speed at which the magnet is moved in and out of the coil is increased, a greater deflection of the needle is observed - NSC Technical Sciences - Question 10 - 2021 - Paper 1
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If the speed at which the magnet is moved in and out of the coil is increased, a greater deflection of the needle is observed. Explain this observation, in terms of rate of change in magnetic flux and induced emf.
Answer
When the speed of the magnet is increased, the rate of change in magnetic flux through the coil also increases. According to Faraday's Law of electromagnetic induction, the induced emf is directly proportional to the rate of change of magnetic flux. Therefore, as the rate of change increases, the induced emf becomes stronger, leading to a greater deflection of the needle on the measuring device.
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