Question

Divya set up an experiment using a liquid A in the beaker as shown in the figure. She observed that the bulb glows. Then she replaced a liquid by another liquid B. This time the bulb did not glow. Kavya suggested to replace a bulb by an LED. They observed that the LED glow.
A) What was the nature of liquid A?​

Answer 1

Explanation:

The current through liquid B could be weak and therefore unable to make the bulb glow. However, it was strong enough for the LED to glow.