When the free ends of a conductivity tester (made by using a battery connected to a wire wound around a compass) are dipped into a solution, the magnetic needle shows deflection. Can you give the reason for this deflection?
ScienceClass 8ICSEAnswered 28 Mar 2026
Answer
Solution:
Deflection of the magnetic needle is due to the magnetic field produced around it. The free ends of a conductivity tester are dipped into a conducting solution then; it behaves like a current-carrying wire.
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