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Q.

The lead of a pencil is


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a

An insulator

b

A conductor 

c

A semiconductor

d

None of these 

answer is B.

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Detailed Solution

The lead of a pencil is a conductor.
The lead of a pencil is made up of graphite, a good conductor of electric current. However, the resistance of graphite is quite higher than the wire’s resistance. Therefore, it requires slightly more voltage to pass the current through it.
 
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