Lakshya Education MCQs

Question: A rigid body suspended vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called
Options:
A. Simple pendulum
B. Compound pendulum
C. Second's pendulum
D. None of these
Answer: Option B

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Question 1. When two forces, each equal to p, act at 90° to each other, then the resultant will be
  1.     P
  2.     P√2
  3.     P/√2
  4.     2P
Answer: Option B
Question 2. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. the reaction between the sphere and the wall of the arrangement made is
  1.     102.5 kg
  2.     105.5 kg
  3.     108.5 kg
  4.     110 kg
Answer: Option A
Question 3. A rigid body suspended vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called
  1.     Simple pendulum
  2.     Compound pendulum
  3.     Second's pendulum
  4.     None of these
Answer: Option B
Question 4. When a body falls freely under gravitational force, it possesses
  1.     Maximum weight
  2.     Minimum weight
  3.     No weight
  4.     No effect on its weight
Answer: Option C
Question 5. Moment of inertia of a squares of side ‘b’ about an axis through its centre of gravity, is
  1.     b³/4
  2.     b⁴/12
  3.     b⁴/3
  4.     b⁴/8
Answer: Option B
Question 6. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. the reaction between the sphere and the wall of the arrangement made is
  1.     102.5 kg
  2.     105.5 kg
  3.     108.5 kg
  4.     110 kg
Answer: Option A

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