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What is displacement? Explain its general meaning by giving examples.

Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Displacement : The distance of the oscillator (simple harmonic body means oscillator) at any instant from the equilibrium (fixed or reference point) position is called displacement of the oscillator at that instant. <br/> The displacement is considered positive from one side of equilibrium point and negative from other side. In short, displacement prossess zero, positive and negative values. <br/> Displacement is refers to change with time of any physical property under consideration. Its examples are as follow : <br/> (1) In case of rectilinear motion of a steel ball on a surface, the distance from the starting point as a function of time is its position displacement. The choice of origin is a matter of convenience. <br/> (2) <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_PHY_XI_P2_C14_E01_010_S01.png" width="80%"/> <br/> Consider a block attached to a spring, the other end of which is fixed to a rigid wall, as shown in figure (a). The block moves on a <a href="https://interviewquestions.tuteehub.com/tag/frictionless-1000488" style="font-weight:bold;" target="_blank" title="Click to know more about FRICTIONLESS">FRICTIONLESS</a> surface. <br/> The motion of the block can be described in terms of its distance or displacement x from the wall. <br/> (3) In figure (b), an <a href="https://interviewquestions.tuteehub.com/tag/oscillating-2900383" style="font-weight:bold;" target="_blank" title="Click to know more about OSCILLATING">OSCILLATING</a> simple pendulum. its motion can be described in terms of angular displacement `theta` from the vertical. <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_PHY_XI_P2_C14_E01_010_S02.png" width="80%"/> <br/> For an oscillating simple pendulum, the angle from the vertical as a function of time may be regarded as a displacement variable. <br/> (4) The displacement variable may be taken in pressure variations with time in the propagation of sound <a href="https://interviewquestions.tuteehub.com/tag/wave-22399" style="font-weight:bold;" target="_blank" title="Click to know more about WAVE">WAVE</a> in air. <br/> (5) The displacement variable may also take in the changing electric and magnetic fields in a <a href="https://interviewquestions.tuteehub.com/tag/electromagnetic-968633" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTROMAGNETIC">ELECTROMAGNETIC</a> waves. <br/> (6) The voltage across a capacitor, changing with time in an a.c. circuit is also a displacement variable. <br/> Hence, it is not so that the displacement variable always taken as in the context of position but above shown displacement variable may be taken.</body></html>


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