CBSE Class 8 Science
Question 2 of 12
Chemical Effects of Electric Current — Question 2
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Question Question 2
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
The deflection of the magnetic needle can be explained by the flow of current through the wounded wire of the tester. When the free ends of a tester are dipped into a solution, the circuit becomes complete and current starts flowing through the solution proving that the solution is a good conductor of electricity. The current then flows through the wire creating a magnetic field that deflects the magnetic needle.