15. A boy sharpens a pencil at both the ends and then uses its black ends to complete an electrical circuit. Will the currenti through the electrical circuit? Give reason for your answer. Name the black substance of the pencil.

15. A boy sharpens a pencil at both the ends and then uses its black e

1.	15. A boy sharpens a pencil at both the ends and then uses its black ends to complete an electrical circuit. Will the currenti through the electrical circuit? Give reason for your answer. Name the black substance of the pencil.
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