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PHYSICS MCQs

Total Questions : 3767 | Page 22 of 377 pages
Question 211. In uniform circular motion, the linear velocity is perpendicular to
  1.    Radius
  2.    Force
  3.    Radius vector
  4.    Momentum
 Discuss Question
Answer: Option C. -> Radius vector
Question 212. Flywheel is an important part of a steam engine because it :
  1.    Accelerates the speed of the engine
  2.    Helps the engine in keeping the speed uniform
  3.    Decreases the moment of inertia
  4.    Gives strength to the engine
 Discuss Question
Answer: Option B. -> Helps the engine in keeping the speed uniform
Question 213. The following particles move with same kinetic energy. Which of them has maximum momentum ?
  1.    Electron
  2.    Proton
  3.    Deutron
  4.    Alpha Particle
 Discuss Question
Answer: Option D. -> Alpha Particle
Question 214. Should cars have bumpers that collapse under impact?
  1.    Yes, since the offending car should get damaged and pay for the mistake
  2.    No, since it would be very expensive to get the car repaired
  3.    No, since the colliding car would then ram into the occupants and kill them
  4.    Yes, since they help to absorb the impact of a collision and keep the occupants safe
 Discuss Question
Answer: Option D. -> Yes, since they help to absorb the impact of a collision and keep the occupants safe
Question 215. When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?
  1.    Four times
  2.    Two times
  3.    Half
  4.    One-fourth
 Discuss Question
Answer: Option A. -> Four times
Question 216. The odometer guage indicates
  1.    The distance travelled by a vehicle
  2.    The depth of the ocean
  3.    Pitch length
  4.    Frequency of the wave
 Discuss Question
Answer: Option A. -> The distance travelled by a vehicle
Question 217. Consider the following statements :1. There is no net moment on a body which is in equilibrium.2. The momentum of a body is always conserved.3. The kinetic energy of an object is always conserved.Which of the statements given above is/are correct?
  1.    1, 2 and 3
  2.    2 and 3 only
  3.    1 and 2 only
  4.    1 only
 Discuss Question
Answer: Option C. -> 1 and 2 only
Question 218. If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects?
  1.    Acceleration
  2.    Kinetic Energy
  3.    Velocity
  4.    Momentum
 Discuss Question
Answer: Option D. -> Momentum
Question 219. The rate of change of linear momentum of a body falling freely under gravity is equal to it's ________ ?
  1.    Kinetic Energy
  2.    Weight
  3.    Potential Energy
  4.    Impulse
 Discuss Question
Answer: Option B. -> Weight
Question 220. According to the theory of relativity, which of the following always remains constant ?
  1.    Length of an object
  2.    Time
  3.    Space
  4.    Velocity of light
 Discuss Question
Answer: Option D. -> Velocity of light

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