Question

Substances through which electricity cannot flow is ____.

Answer 1

1. Insulators are materials that do not allow an electric current to pass through them.
2. Insulators include materials such as glass, rubber, wood, and plastics.
3. The electrons in insulators are so firmly bonded to one another that no free electrons are available for mobility.
4. As a result, they are unable to conduct electricity.

Hence substances through which electricity cannot flow is insulator.