Question

when the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
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Answer 1

Answer:

Electric current produces magnetic effect. When free ends of a tester are dipped in the solution, the solution conducts electricity as it is a good conductor of electricity. So, the circuit is now complete. Hence, electricity passes through the wire causing deflection of the magnetic needle of a compass.

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Answer 2

magnetic needle shows that electric current is flowing through the wires. The circuit is complete since the free ends of the tester are dipped into a solution. Also, the solution is a good conductor of electricity. So, the magnetic needle shows deflection.

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