Class X

Every temperature measuring instrument makes use of a physical property of a substance in order to measure temperature objectively, which physical property is used by resistance thermometer?
  1. Electromotive force
  2. Resistance of a piece of metal
  3. Volume of a fixed mass of liquid
  4. Pressure of a fixed mass of gas atonstant volume
Amount of matter in a body is termed as
  1. Weight
  2. Force
  3. Mass
  4. Tension
From physics point of view, work is being done by
  1. A man carrying a heavy pile of books in a stationary position
  2. A boy rote learning for his physics exam
  3. A girl working on her Math homework
  4. None of them
If air at a pressure of 1 MPa is compressed such that new volume of air is one quarter of its initial volume, then new pressure of air is
  1. 1 M Pa
  2. 0.25 M Pa
  3. 2 M Pa
  4. 4 M Pa
Two points on same line at same distance and speed are said to be in
  1. Parallel
  2. Phase
  3. Displacement
  4. Pair
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