Paheli set up an experiment using liquid A in the beaker as shown in the figure below. She observed that the bulb glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain.
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In this experiment, liquid A must have been a good conductor of electricity and allowed the maximum current to pass through it, which is sufficient to glow the bulb.

Whereas, when it is replaced by another liquid B, the bulb does not glow because the current through liquid B could be weak to make the bulb glow.

Whereas, when it is replaced by another liquid B, the bulb does not glow because the current passing through the liquid B would have been so weak that the bulb would not glow. But the small current which is passing through B would be sufficient to glow a low voltage LED, that's why the LED glows.

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Updated on: 10-Oct-2022

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Paheli set up an experiment using liquid A in the beaker as shown in the figure below. She observed that the bulb glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain."\n

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Paheli set up an experiment using liquid A in the beaker as shown in the figure below. She observed that the bulb glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain.
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