Two electrons are removed from a conductor, the charge on it is
Correct answer: C. -3.2 x 10^-19C
- A. 1.6 x 10^-19 C
- B. 3.2 x 10^-19 C
- C. -3.2 x 10^-19C
- D. neutral
Explanation
The charge of one electron is 1.6×10^−19 C. When two electrons are removed, the net charge on the conductor is 2×(1.6×10^−19)=3.2×10^−19 C. Since electrons are negatively charged, the net charge on the conductor becomes positive, resulting in a charge of −3.2×10^−19 C.Incorrect options: (a) This is the charge of one electron, not the total charge when two electrons are removed.(b) The calculation should account for the removal of two electrons, not one.(d) The removal of electrons would result in a net charge, not neutrality.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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