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MCQ practice · SSC Physics Board questions · Chapter 5: State of Matter and Pressure

Dinajpur Board 2023

According to Pascal's law, if the ratio of the cross-sectional areas of the large cylinder and the small cylinder is 100, then in the large cylinder-

  1. i. force will increase
  2. ii. energy will increase
  3. iii. 100 times the force will be obtained

Think it through first, then pick an option.

  1. a i and ii
  2. b i and iii
  3. c ii and iii
  4. d i, ii and iii
Answer and explanation

Correct answer: b i and iii

i is true: the large cylinder gets more force than the small one.; Statement ii is not true: energy does not increase; the force rises but the large piston moves less, and the energy stays the same.; iii is true: with an area ratio of 100 the large cylinder gets 100 times the force.

Why the other options are wrong

  • a i and ii: Statement ii is not true: energy does not increase; the force rises but the large piston moves less, and the energy stays the same.
  • c ii and iii: Statement ii is not true: energy does not increase; the force rises but the large piston moves less, and the energy stays the same.
  • d i, ii and iii: Statement ii is not true: energy does not increase; the force rises but the large piston moves less, and the energy stays the same.