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Question

You are using a tester with a light bulb to conduct an experiment to find out if a liquid is a conductor of electricity. But you observe that one of the liquids which are supposed to be a conductor according to your textbook is not causing the light bulb to glow, even though you have checked that all the connections are fine, and the battery and bulb are in working condition. What could be the possible reason for this?


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Solution

Step 1: Electric conductor

An electric conductor is an object or type of material that allows an electric charge to flow in one or more directions.

Step 2: Possible reason for not glowing the bulb

  1. The filament of an electric light bulb glows due to the heating effect of an electric current. When current flows through the bulb, the filament heats up to a high temperature which increases the kinetic energy of electrons in the filament and they start striking the inner wall of the bulb and it glows.
  2. If the current is too low, the filament may not be heated enough to glow.

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