A body is said to be under forced vibrations, when
A. There is a reduction in amplitude after every cycle of vibration
B. No external force acts on a body, after giving it an initial displacement
C. A body vibrates under the influence of external force
D. None of the above
Answer: Option C
Solution (By Examveda Team)
Forced vibrations occur when a body is made to vibrate by the continuous action of an external periodic force.In this case, the vibration is maintained by the applied external force rather than by the body’s own natural tendency to vibrate.
Option A describes damped vibrations, where amplitude decreases after each cycle due to energy loss.
Option B refers to free vibrations, where no external force acts after the initial displacement.
Therefore, a body is said to be under forced vibrations when it vibrates under the influence of an external force, making Option C the correct answer.
This Question Belongs to Mechanical Engineering >> Theory Of Machine
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Comments (9)
In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by
A. μ1 = μsinβ
B. μ1 = μcosβ
C. $${\mu _1} = \frac{\mu }{{\sin \beta }}$$
D. $${\mu _1} = \frac{\mu }{{\cos \beta }}$$
The lower pairs are _________ pairs.
A. Self-closed
B. Force-closed
C. Friction closed
D. None of these
In a coupling rod of a locomotive, each of the four pairs is a ________ pair.
A. Sliding
B. Turning
C. Rolling
D. Screw
A kinematic chain is known as a mechanism when
A. None of the links is fixed
B. One of the links is fixed
C. Two of the links are fixed
D. None of these
Option A is wrong. Its is the answer of under damped system.
Option C is correct.
C is correct
This question is wrong. Please update it
AS PER R. S. KHURMI BOOK , COPTION IS WRIGHT
A body vibrates under the influence of external force
Question is wrong: Is should be like as per following< Damped Forced vibration>
option C will be correct
Wrong answer
option C should be correct.