Which one of the following statements is correct with regard to the ma

Which one of the following statements is correct with regard to the material of electrical insulators ?

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They contain no electrons

Electrons do not flow easily through them

They are crystals

They have more number of electrons than the protons on their surface

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2017

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The correct statement is that electrons do not flow easily through electrical insulators.

Electrical insulators are materials characterized by their high resistance to the flow of electric current. This property arises because the electrons in these materials are tightly bound to the atoms and are not free to move readily under the influence of an electric field.

Option A is incorrect; all matter contains electrons. Option C is incorrect; insulators can be crystalline (like quartz), amorphous (like glass), or polymeric (like rubber, plastic). Option D is incorrect; insulators are generally electrically neutral, meaning the total number of electrons is equal to the total number of protons. The key characteristic of insulators is the low mobility of charge carriers, specifically electrons in most common insulators.

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