Exam-style question
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During the search coil experiment, a researcher observes that the induced emf increases when the coil is moved more quickly through a magnetic field. What does this observation reveal about the relationship between the coil’s velocity and the induced emf, and how does it support the use of a search coil in detecting magnetic fields?.
Model answer
What a good answer should say
- The observation shows that the induced emf is directly proportional to the coil’s velocity through the magnetic field.
- A faster movement causes a quicker change in magnetic flux linkage, leading to a larger emf.
- This confirms that a search coil can effectively detect magnetic fields by translating motion into a measurable voltage, making it a useful tool for mapping field strength and direction.
Explanation
Why this works
The answer links experimental observation to the underlying physics, demonstrating application of Faraday’s law and the practical utility of the search coil. It tests the student’s ability to interpret data and explain its significance.
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