Question:
A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in
the wire is increased ? Support your answer with a reason. (CBSE 2012)
Solution:
A magnetic compass is a tiny magnet. It gets deflected when placed in a magnetic field. When the current in the wire increases, then the magnetic
field produced by the wire also increases (∴ B ∝ I). Hence, deflection of the compass increases.
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