A copper sphere of mass 2gm …
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Posted by Monica Suresh 4 years, 11 months ago
- 2 answers
Gaurav Seth 4 years, 11 months ago
A copper sphere of mass 2 g contains nearly 2 x 1022 atoms. The charge on the nucleus of each atom is 29 e. What fraction of the electrons must be removed from the sphere to give it a charge of +2 μC?
<hr />Total number of electrons in the sphere = 29 x 2 x 1022
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Gaurav Seth 4 years, 11 months ago
Explanation:
Charge of each nucleus = 29e
∴ Net charge 2 gm sphere = (29e) × (2 × 1022) = 5.8 × 1023e c.
∴ No of electrons on sphere = 5.8 × 1023
∴ No of electrons removed to give 2μc charge
= (q/e)
= [(2 × 10–6)/(1.6 × 10–19)]
= 1.25 × 1013
∴ fraction of electrons removed = [(1.25 × 1013)/(5.8 × 1023)]
= 2.16 × 10–11
2Thank You