Question

Which of the following is not an insulator?

• A. Bricks
• B. Brass
• C. Bamboo
• D. Plastic

Answer 1

The correct option is B

Brass

Explanation for correct option:

B. Brass

Insulators:

• An electrical insulator is a substance that does not conduct electricity.
• In insulators, the electrons are tightly bound and cannot move freely at room temperature.
• Examples of insulators are Plastics, paper, and rubber.

Properties of insulators:

• Insulators have high dielectric strength.
• Non-metallic solids tend to be good insulators.
• They have high resistivity in comparison to conductors as well as semi-conductors.

Brass is a good conductor of heat and electricity.

Explanation for incorrect options:

Bamboo, Bricks, and plastics are poor conductors of heat and electricity while Brass is a good conductor. Thus, options A, C, and D are incorrect.

Hence, the correct option is B i.e. brass is not an insulator.