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14. Chemical Effects of Electric Current
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Q35 of 76 Page 271

Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.

No, it is very risky and unsafe for the electrician to carry out electrical repairs outdoors during heavy downpour because rain water is conducting in nature as it contains dissolved salts. The electrician may get electrical shocks while working outdoors during rain as water may conduct electricity.


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33

Which of the two is a better conductor of electricity: drinking water (tap water) or sea water? Give reason for your answer.

34

Why does a brand new bicycle have shining handlebar and wheel rims? What will happen if these are accidently scratched?

36

When the free ends of a conductivity tester (made by using a battery connected to a wire wound around a compass) are dipped into a solution, the magnetic needle shows deflection. Can you give the reason for this deflection.

37

A beaker contains an acidified copper sulphate solution. A copper plate and a carbon rod are kept in this copper sulphate solution. The copper plate is connected to the positive terminal of a battery whereas the carbon rod is connected to the negative terminal of the battery. What will you observe when an electric current is passed through this set-up for a considerable time?

Questions · 76
14. Chemical Effects of Electric Current
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