Science
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?
Electric Current Chemical Effects
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Answer
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.
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The bulb does not glow in the setup shown in Fig.11.10. List the possible reasons. Explain your answer.
A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A, while it glows very dimly for liquid B. You would conclude that
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