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Electric Charges And Fields

Question

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?

Solution

Total number of electrons in the sphere = 29 x 2 x 10^{22
$No . of electrons = \frac{q}{e} = \frac{2 \times 10^{- 6}}{1.6 \times 10^{- 19}} = 1.25 \times 10^{13}$
$Fraction of electrons removed = \frac{1.25 \times 10^{13}}{29 \times 2 \times 10^{22}} = 2.16 \times 10^{- 11}$}

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

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Electric Charges And Fields

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?

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

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For Daily Free Study Material Join wiredfaculty

Electric Charges And Fields

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?

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?b) Explain why two field lines never cross each other at any point?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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?

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?