Bissoy.com
Doctors Medicines MCQs Q&A

When a system is subjected to forced vibrations, then under steady-state conditions

When a system is subjected to forced vibrations, then under steady-state conditions Correct Answer it vibrates at the imposed frequency

Explanation:

Vibration: 

  • Vibration is a mechanical phenomenon, where oscillation takes place around an equilibrium point, it is a to and fro motion of an object.
  • There are two basic types of vibration. 
    • Free vibration
    • Forced vibration
  • Free vibration occurs when a mechanical system is set off with an initial input and then allowed to vibrate freely.
  • In the case of free vibration, the body will vibrate at its natural frequency of vibration.
Forced vibration:
  • If a system or body is subjected to periodic external forces then the resulting vibration is called Forced vibration.
  • when an external force is applied than the body starts vibration, and when the body vibrates with constant amplitude then we called it steady-state of vibration, now the body will not vibrate about its natural frequency of vibration, but vibrate with the frequency of applied external force which is called imposed frequency.

 

Important Points

In free vibration, object vibrate with their natural frequency & in forced vibration object with the frequency of excitation force i.e. imposed frequency. 

Related Questions

Statement: Resonance is a special case of forced vibration in which the nature and frequency of vibration of the body are the same as the impressed frequency and the amplitude of forced vibration, is maximum. Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force.
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.
In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient.
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
In which of the following cases, there exists the situation of Pure Bending in some part of the beam or along the entire beam? i) A simply supported beam subjected to two equally spaced downward concentrated loads ii) A simply supported beam subjected to two equally spaced opposite moments iii) A cantilever beam subjected to clockwise moment at free end iv) An overhanging beam with both side overhangs subjected to different concentrated loads at both the free ends
Consider the following the statements 1. The oscillation of a particle with fundamental frequency under the influence of restoring force is defined as forced oscillations 2. The oscillation of a body whose amplitude goes on decreasing with time is defined as damped oscillation. 3. The oscillation in which a body oscillates under the influence of an external periodic force is known as forced oscillation. Which of the following statements is/are correct?
A body is said to be under forced vibrations, when
X, a blacksmith, is seized by a gang of dacoits and forced, by threat of instant death to take his tools and forced him to open the door of Y's house. The dacoits then looted Y's money and jewels and also killed Y's son Z. What offence, among the following offences under Indian Penal Code, 1860 has been committed by X?
A circuit breaker is a piece of equipment which can (i) make or break a circuit either manually or by remote control under normal conditions. (ii) break a circuit automatically under fault conditions. (iii) make a circuit either manually or by remote control under fault conditions Choose the correct answer. 
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.