Photocopier and ink-jet printer are applications of _.
Correct answer: A. Electrostatics
- A. Electrostatics
- B. Magnetism
- C. Thermal physics
- D. Quantum physics
Explanation
Printers and photocopiers use the phenomena of electrostatics in their working, as a field of positive charges is accumulated on the surface of the paper which is printed.
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About Electrostatics
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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