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. Out of the following, which one conclusion can be drawn?

Liquid A is a better conductor than Liquid B.

The correct answer is option 1. Liquid A is a better conductor than Liquid B.

The observation that the bulb of the tester glows brightly for liquid A and very dimly for liquid B suggests that there is a difference in the electrical conductivity of the two liquids. Let's break down the possible conclusions:

1. Liquid A is a better conductor than Liquid B:

The bright glow of the tester bulb for liquid A indicates that it allows a significant flow of electric current through it. This suggests that liquid A has a higher electrical conductivity compared to liquid B.

2. Liquid B is a better conductor than Liquid A:

The very dim glow of the tester bulb for liquid B suggests that it allows only a small amount of electric current to pass through. This implies that liquid B has lower electrical conductivity compared to liquid A.

3. Both liquids are equally conducting:

This conclusion is not consistent with the observation. If both liquids were equally conducting, the tester bulb would show a similar brightness for both.

4. Conducting properties of liquid cannot be compared in this manner:

While it is true that the specific conductivity values might not be obtained from this simple test, the qualitative observation does indicate a difference in conductivity between the two liquids.

Given the observations, the most reasonable conclusion is that Liquid A is a better conductor than Liquid B. The varying brightness of the tester bulb suggests differences in the ability of the liquids to conduct electricity.