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PHYSICS MCQs

Total Questions : 3767 | Page 16 of 377 pages
Question 151. What is the direction of torque?
  1.    Perpendicular to the direction of applied force
  2.    Same as the direction of applied force
  3.    Opposite to the direction of applied force
  4.    Parallel to the radius
 Discuss Question
Answer: Option A. -> Perpendicular to the direction of applied force
Question 152. The motion of a body around a circular path is an example of
  1.    Uniform velocity, variable acceleration
  2.    Uniform speed, uniform velocity
  3.    Uniform speed, variable velocity
  4.    Uniform speed, variable acceleration
 Discuss Question
Answer: Option A. -> Uniform velocity, variable acceleration
Question 153. What should a person on a freely rotating turn table do to decrease his (angular) speed ?
  1.    Bring his hands together
  2.    Raise his hands up
  3.    Spread his hands outwards
  4.    Sit down with raised hands
 Discuss Question
Answer: Option C. -> Spread his hands outwards
Question 154. If a body moves with a constant speed in a circle
  1.    No work is done on it
  2.    No force acts on it
  3.    No acceleration is produced in it
  4.    Its velocity remains constant
 Discuss Question
Answer: Option D. -> Its velocity remains constant
Question 155. A sphere rolls down on two inclined planes of different angles but same height, it does so
  1.    In the same time
  2.    With the same speed
  3.    In the same time with the same speed
  4.    In the same time with the same kinetic energy
 Discuss Question
Answer: Option B. -> With the same speed
Question 156. A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
  1.    Depends on their masses
  2.    Sphere
  3.    Disk
  4.    Both reach at the same time
 Discuss Question
Answer: Option B. -> Sphere
Question 157. The washing machine works on the principle of
  1.    Dialysis
  2.    Diffusion
  3.    Reverse osmosis
  4.    Centrifugation
 Discuss Question
Answer: Option D. -> Centrifugation
Question 158. What type of force acts on a car moving around a curve?
  1.    Centrifugal force
  2.    Cohesive force
  3.    Centripetal force
  4.    Gravitational force
 Discuss Question
Answer: Option C. -> Centripetal force
Question 159. When an unbalanced force acts on an object
  1.    Causes change in motion of the object
  2.    The speed & direction of the object will change
  3.    Causes the object to move
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 160. Damp clothes are dried in spin dryers by the action of
  1.    Centripetal forces
  2.    Centrifugal forces
  3.    Central forces
  4.    Non central forces
 Discuss Question
Answer: Option B. -> Centrifugal forces

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