Question

Which of think following materials is the best is the best choice for an insulating material?

A. silver metal.
B. steel bars.
C. rubber< I think this one but not sure.

Answer 1

You are correct, the answer is C.

Good insulators are materials that do not allow heat, electricity, light or sound pass through easily. Materials like steel and silver (which are metals) are not good insulators because they make good conductors. They easily allow heat, electricity and the like pass through them.

Thus, the answer is letter C. Rubber.