Question

20. Read the following and answer the questions from 20 (i) to 20(v)

Conductor are material that permit electrons to flow freely from particle to particle.

Conductors allow for charge transfer through the free movement electrons. In contrast to conductors, insulators are materials that impede the free flow of electrons from atom to atom

and compare to some conductor like, copper, iron, silicon, silver is a most conductive

element.

20(i) Why copper a preferred choice in making electrical wires?

(a) copper is a good conductor of electricity (b) poor conductors of electricity

(c) insulator

(d) superconductors

20(ii) Which of the following is the most conductive element?

(a) copper

( (b) iron

20(iii) Which among the

(a) wool

(c) silver

following is not an insulator?

(b) silver

20(iv) The energy gap is maximum is

(c) plastic

(a) conductors (b) semi conductors (c) insulators (d) superconductors

(d) silicon

(d) paper


20(v) conductors are material that allow

(a) allow the flow of heat

(c) does not allow heat to flow

(b) allow cold to flow

(d) stops cold from passing through.​

Answer 1

20. I) copper is a good conducter of electricity