Question

Which of the following materials will glow the bulb in the circuit if placed in place of a plastic spoon? 
(a) mercury, wood, aluminium
(b) aluminium, gold, silver
(c) aluminium, wood, rubber
(d) gold, silver, rubber​

Answer 1

Answer:

b) aluminium ,gold ,silver

Explanation:

hope it helps you

Answer 2

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Why bulb does not glow if plastic spoon is used ?

The current will not flow through plastics as they are bad conductor of electricity and thus,they have no free ions to produce electricity.

What should be the alternate for plastic spoon so that bulb can glow ?

Basically,metals are good conductors of electricity.They have large number of free ions which helps in large amount of conduction of electricity .

$\fbox{Option b) is correct answer}$

Explanation :

• In option a) wood is an insulator,so it cannot be used in place of the spoon.
• In option b) all the three represents metals being good conductor of electricity.So,this is the most accurate answer.
• In option c) wood and rubber are insulators.So,there will be no conduction.
• In option d) rubber is a bad conductor of electricity.