Q11 of 330 Page 5

What is meant by conductors and insulators? Give two examples of conductors and two of insulators.

Those substance which allow electric current to pass through them easily is called conductors. Examples. Iron, copper, zinc e.t.c

Those substance which do not allow electric current to pass through them is called Insulators. Examples. Mica, Air, Paper, e.t.c


More from this chapter

All 330 →
9

Define one coulomb charge.

 10

Fill in the following blanks with suitable words :

(a) Potential difference is measured in …………… by using a ……….. placed in ……… across a component.


(b) Copper is a good ………. plastic is an ………..

 12

Which of the following are conductors and which are insulators?

Sulphur, Silver, Copper, Cotton, Aluminium, Air, Nichrome, Graphite, Paper, Porcelain, Mercury, Mica, Bakelite, Polythene, Manganin.

 13

What do you understand by the term “electric potential”? (or potential) at a point? What is the unit of electric potential?