Question

when the free ends of a tester different to solution the magnetic needle show deflection can you explain the reason​

Answer 1

Answer:

when the free ends of a tester different to solution the magnetic needle show deflection this is because electric current flowing through the wire produces the electric current

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Answer 2

Answer:

when the free ends of a tester are dipped into a solution, the wire wrapped around the magnetic field. Due to it mangnetic needle reflects magnetic compass. That's why magnetic needle shows deflection!!!!