Question

Which of the following groups of materials contains only conductors?

• A. copper, zinc, glass, plastic
• B. zinc, cotton, iron, plastic
• C. copper, gold, silver, iron
• D. glass, wood, cotton, air

Answer 1

The correct option is C

copper, gold, silver, iron

1. From the materials given in the options copper, gold, silver, iron and zinc are conductor materials.
2. The materials which allow the flow of electric current through it is known as conductors.
3. From the materials given in the options glass, wood, cotton, air and plastic are insulator materials.
4. In option (C) all the materials are conductors.

Hence, the correct option is (C).