A bar magnet is placed stationary next to a conducting coil, as shown below.What do we observe in the coil?Choose 1 answer:
Correct answer: C. Nothing happens.
- A. The magnet feels a force due to the coil.
- B. A current flows from A to B.
- C. Nothing happens.
- D. A current flows from B to A.
Explanation
If the magnet is brought near the coil, the field associated with the coil changes and hence the magnetic field changes. This change in magnetic flux induces current in the coil. This can be done by bringing magnet to the coil, or bringing coil to the magnet. However in the case mentioned there is no change in motion or flux thus nothing happens.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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