Question

can a pencil sharpened at both ends be used as a conductor ? give reason in support of your answer.

Answer 1

Yes,a pencil sharpened at both ends can be used as a conductor.
Because,the pencil lead is made up of graphite and graphite is good conductor of electricity.
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Answer 2

CARBON ATOMS TRY TO FORM 4 BONDS . BUT CARBON IN GRAPHITE FROMS 3 BONDS . DUE TO THIS FREE ELECTRON , IT CAN CONDUCT ELECTRICITY . BUT , WOOD DOES NOT CONDUCT ELECTRICITY . SO , ONE SIDE SHARPENED PENCIL DOES NOT CONDUCT ELECTRICITY BECAUSE OF WOOD BLOCKING GRAPHITE'S CONNECTION WITH WIRES WHILE BOTH SIDES SHARPENDED  PENCIL CONDUCTS ELECTRICITY DUE TO FREE CONNECTION BETWEEN GRAPHITE AND WIRES .


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