Donald Duck conducted experiment to test the conductivity of two liquids A and B by using the tester with magnetic needle. Current is passed through both the liquids and it is found that magnetic needle deflected more in case of Liquid B. Which among these liquids is a poor conductor and why?

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Solution

Due to the magnetic effect of current, more deflection implies more current passed which means more conductivity. So, liquid A is the poor conductor.

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Donald Duck conducted an experiment to test the conductivity of two liquids A and B by using a tester with magnetic needle. Current was passed through both the liquids and it was found that the magnetic needle deflected more in case of Liquid B. Which among these is a poorer conductor and why? [2 MARKS]

Question 5
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
(i) liquid A is a better conductor than liquid B.
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(iv) conducting properties of liquid cannot be compared in this manner.

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