Question 2
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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Solution

Electric current produces magnetic effect which causes deflection of the magnetic needle of a compass. So, when the free ends of a tester are dipped into a solution which is a good conductor of electricity, the needle shows deflection.

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Standard VIII Physics

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Question 2 When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?

Electric current produces magnetic effect which causes deflection of the magnetic needle of a compass. So, when the free ends of a tester are dipped into a solution which is a good conductor of electricity, the needle shows deflection.

Question 2
When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?