Q&A/Class 8/Science

How can we check whether a tester is working or not?

Class 8CBSEScienceChapter: Chemical Effects of Electric Current
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Join the free ends of the tester together, for a moment, and check whether the bulb glows or not, if the bulb glows it means tester is working and if not, it means tester is not working. In case it does not glow check that all connections are tight, or not.

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