Q24 of 32 Page 20

If in Fig 4.1 iron nails is replaced by wooden stick, will the bulb glow or not? Justify your answer.

If we replace iron nails with the wooden stick the bulb will not glow as wood is a non-conductor of electricity.


More from this chapter

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22

Paheli bought a statue made of copper. To her surprise it acquired a dull green coating after a couple of months. Explain the reason.

 23

In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.


(a) _____ is a metal.


(b) Metals are good _____ of electricity.

 25

Paheli prepared a blue coloured solution of copper suplhate in beaker a and placed an iron in it. Boojho prepared a yellowish green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour?

 26

A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.