Lakshya Education MCQs

Question: The atmospheric air is held to the Earth by :
D.Rotation of the Earth
Answer: Option A

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Question 1. The pressure of a fluid varies with depth h as P = PQ+pgh, where p is the fluid density. This expression is associated with
  1.    Pascal's law
  2.    Newton's law
  3.    Bernoulli's principle
  4.    Archimedes' principle
Answer: Option A
Question 2. A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because
  1.    Stone is heavier than parachute
  2.    Special mechanisms are present in parachute
  3.    A parachute has a larger surface area and air resistance is more
  4.    None of these
Answer: Option C
Question 3. Why does bleeding occur through the nose in high mountainous regions ?
  1.    The pressure of blood in capillaries is greater than the outside pressure
  2.    The pressure at high altitudes is greater than that on the plains
  3.    The blood pressure of a person increases at high altitudes
  4.    The blood pressure fluctuates and finally decreases drastically
Answer: Option C
Question 4. The slope of a velocity-time graph represents
  1.    Acceleration
  2.    Displacement
  3.    Distance
  4.    Speed
Answer: Option A
Question 5. What does the slope of a velocity time graph represent?
  1.    Acceleration
  2.    Distance
  3.    Speed
  4.    Momentum
Answer: Option A
Question 6. When a body is accelerated, then the velocity will be also
  1.    Increase
  2.    Decrease
  3.    Constant
  4.    None of the above
Answer: Option A

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