Question:

Two identical spheres carrying charges - ${9 \, \mu C}$ and ${ 5 \, \mu C}$ respectively are kept in contact and then separated from each other. Point out true statement from the following. In each sphere

Updated On: Jun 23, 2023
  • $1.25 \times 10^{13} $ electrons are in deficit
  • $1.25 \times 10^{13} $ electrons are in excess
  • $2.15 \times 10^{13} $ electrons are in excess
  • $2.15 \times 10^{13} $ electrons are in deficit
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The Correct Option is B

Solution and Explanation



After initial contact and separation, each sphere will be having -${2\, \mu C}$ each
$ \therefore \:\:\:\: n = \frac{ -2 \times 10^{-6} }{ -1.6 \times 10^{-19}} = 1.25 \times 10^{13}$
$i.e. \:\: 1.25 \times 10^{13}$ electrons as in excess in each sphere.
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Concepts Used:

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It is the property of subatomic particles that experiences a force when put in an electric and magnetic field.

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