Question

Plastic wood glass and air seventh class​

Answer 1

In which of these groups are all the items transparent?

(a) water, mirror, spectacles

(b) water, air, spectacles

(c) mirror, air, steel plate

(d) wood, steel

Answer 2

Insulators oppose electrical current and make poor conductors. Some common conductors are copper, aluminum, gold, and silver. Some common insulators are glass, air, plastic, rubber, and wood. They don't conduct electricity.so, they are Insulators.