UPSC Prelims 1997·GS1·science-and-technology·science and technology

The working principle of a washing machine is

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Last updated 23 May 2026, 3:31 pm IST
  1. AcentrifugationCorrect
  2. Bdialysis
  3. Creverse osmosis
  4. Ddiffusion

Explanation

The correct answer is centrifugation. A washing machine works on the principle of centrifugation, which is a process used to separate particles from a solution based on their size, shape, and density. When the machine spins at high speeds, a centrifugal force acts on the wet clothes and water. This outward force pushes the water through the small holes in the drum, effectively separating the water from the fabric and drying the clothes. Other options are incorrect because dialysis is used for filtering blood in kidney patients, reverse osmosis is used for water purification, and diffusion is the movement of particles from high to low concentration.
science-and-technology: The working principle of a washing machine is

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