Physics MCQs with answers Page - 18

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Q. Pressure Cooker cooks faster because

  • (A) Boiling point decreases with rise of pressure
  • (B) It cooks the food at low pressure
  • (C) Higher temperature is attained for cooking
  • (D) The material of the cooker is a good conductor

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Q. In a particular system, the units of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. The unit of force in this system will be equivalent to

  • (A) 0.1 N
  • (B) 1 N
  • (C) 10 N
  • (D) 100 N

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Q. The weakest of all fundamental forces is

  • (A) Gravitational force
  • (B) Electrostatic force
  • (C) Magnetic force
  • (D) Nuclear force

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Q. The unit of force is a

  • (A) Derived Unit
  • (B) Basic Unit
  • (C) Fundamental Unit
  • (D) None of the above

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Q. Atmospheric pressure exerted on earth is due to

  • (A) Gravitational pull
  • (B) Rotation of earth
  • (C) Revolution of earth
  • (D) Uneven heating of earth

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Q. What is the SI unit of Force?

  • (A) Pascal
  • (B) Boyle
  • (C) Newton
  • (D) Watt

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Q. The rice is cooked more quickly in a pressure cooker because

  • (A) It is covered.
  • (B) Less quantity of water is used.
  • (C) Water boils at a higher temperature under pressure.
  • (D) None of these

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Q. Friction can be reduced by changing from

  • (A) Static to Dynamic
  • (B) Rolling to Sliding
  • (C) Dynamic to Static
  • (D) Sliding to Rolling

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Q. A ball rolling along the ground gradually slows down and finally comes to rest is due to ________

  • (A) Friction
  • (B) Magnetic force
  • (C) Electrostatic force
  • (D) Muscular force

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Q. Frictional force acts in

  • (A) The same direction as the motion
  • (B) The opposite direction of the motion
  • (C) All the directions
  • (D) Upward direction

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