alleryA needle displaced in a magnetic field is allowed to:
AOscillate
BDissolve
CEvaporate
DDischarge
Answer & Solution
Correct answer: A. Oscillate
1. The restoring torque pulls the needle back each time.
2. It overshoots and swings past the aligned position.
3. So the needle oscillates in the magnetic field.
_Source: syllabus Physics Part I, Chapter 5, Magnetism and Matter._
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