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Question

According to the conductivity, pick the odd one out from the following:


A

Glass

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B

Copper

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C

Iron

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D

Gold

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Solution

The correct option is A

Glass


Conductor

A conductor is a type of material that allows the flow of charge in it. Electric current is generated due to the flow of negatively charged electrons, positively charged holes, and positive or negative ions in some cases.

The explanation for the correct option:

  1. In the case of option A, glass is an insulator because it has high resistivity and has no free electrons.

The explanation for the incorrect options:

  1. In the case of option B, copper is a conductor because it has low resistivity and free electrons.
  2. In the case of option C, iron is a conductor because it has low resistivity and free electrons.
  3. In the case of option D, gold is a conductor because it has low resistivity and free electrons.

Hence, option A is correct.


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