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Chemical Effects Of Electric Current

Question

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How can we prove conduction of substances when current is very small and the bulb does not glow?

Solution

When current passing through is very weak, the bulb will not glow because the temperature is low. Magnetic compass is used to detect the presence of current. In the presence of electric current, the compass will show deflection indication the presence of current around the compass.

Some More Questions From Chemical Effects of Electric Current Chapter

The passage of an electric current through a solution causes _________ effects.

If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the _________ terminal of the battery.

The process of depositing a layer of any desired metal on another material object by means of electricity is called _______________.

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

Name three liquids, which when tested in the manner shown in figure, may cause the magnetic needle to direct.

The bulb does not glow in the setup shown in figure. List the possible reasons. Explain your answer.

A tester is used to check the conduction of electricity through two liquids, labeled 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

Does pure water conduct electricity? If not, what can we do to make it conducting?

In case of fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.

A child staying in the coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?

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