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
(i) liquid A is a better conductor than liquid B.
(ii) liquid B is a better conductor than liquid A.
(iii) both liquids are equally conducting.
(iv) conducting properties of liquid cannot be compared in this manner.
The bulb in the tester will glow when the liquid is conducting.
Since bulb glows more brightly for liquid A, it means that it is a better conductor.
So, (i) liquid A is a better conductor than liquid B is correct