If LED glows but bulb does not glow while testing a liquid for passage of electric current, it might mean

liquid is a good conductor

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liquid is an insulator

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liquid is a weak conductor

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the circuit is not complete

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Solution

The correct option is C
liquid is a weak conductor

LED glows even with weak currents, so it will glow even in case of a weakly conducting liquid.

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Similar questions

Q. A LED tester glows dim while checking the electrical conductivity of a liquid. The liquid is a _______ conductor of electricity.

Q. When the liquid does not allow the electric current to pass,the circuit of the electric tester is complete and the bulb glows

In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid A while it glows very dimly for liquid B.

(a) Liquid A is a better conductor than liquid B.
(b) Liquid B is a better conductor than liquid A.
(c) Both liquids are equally conducting.
(d) Conducting properties of liquids cannot be compared in this manner.

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.

(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.

If magnetic needle does not deflect, and LED or bulb also does not glow while testing a solution for electrical conductivity, it might imply:

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If LED glows but bulb does not glow while testing a liquid for passage of electric current, it might mean

The correct option is C liquid is a weak conductor LED glows even with weak currents, so it will glow even in case of a weakly conducting liquid.

The correct option is C
liquid is a weak conductor

LED glows even with weak currents, so it will glow even in case of a weakly conducting liquid.