When 1012 electrons are received from a neutral metal sphere. The charge on the sphere becomes:
Correct answer: A. 0.16uc
- A. 0.16uc
- B. -0.16uc
- C. 0.32uc
- D. -0.32uc
Explanation
The formula used is q (charge) = n x e so q = 1012 x 1.6x10-19 =1.6x10-7=0.16 ucAs it is numerical, it can have only one possible answer.
This question appeared on the ETEA MDCAT 2017 paper, which you can sit online with every answer explained.
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About Coulomb's Law
Coulomb's law gives the electrostatic force between two point charges in terms of their magnitudes, separation and the medium between them. Questions involve attraction and repulsion, the inverse square relationship, superposition of forces and vector direction, which must not be confused with the electric field produced by a charge.
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