The ink-jet printer and photocopier work on the principle of
Correct answer: B. electrostatic.
- A. electricity.
- B. electrostatic.
- C. electromagnetism.
- D. electromagnetic induction.
Explanation
Ink-jet printers operate by ejecting tiny ink droplets onto paper. Many inkjet printers utilize electrostatic principles to precisely control and deflect these charged ink droplets, ensuring they land in the correct positions to form images and text. * Photocopiers (which primarily use xerography) rely heavily on electrostatic charges. The process involves uniformly charging a light-sensitive drum, selectively discharging areas when exposed to light (creating a latent electrostatic image), attracting charged toner particles to the charged areas, and then transferring the toner onto paper using further electrostatic charges.
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About Electric Field
An electric field is the force experienced per unit positive test charge, with the field of a point charge given by E = kQ/r² and directed away from positive charges or toward negative charges. Questions involve field lines, superposition and force on a charge, while electric field must be distinguished from electric potential.
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