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

Mymensingh Board 2023

Density of a body depends on which of the following things?

  1. i. the material of the body
  2. ii. the length of the body
  3. iii. the temperature of the body

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: density belongs to the material; the table gives one density for each substance.; Statement ii is not true: changing the length leaves the material the same, so the density does not change.; iii is true: temperature changes the volume but not the mass, so the density may change.

Why the other options are wrong

  • a i and ii: Statement ii is not true: changing the length leaves the material the same, so the density does not change.
  • c ii and iii: Statement ii is not true: changing the length leaves the material the same, so the density does not change.
  • d i, ii and iii: Statement ii is not true: changing the length leaves the material the same, so the density does not change.