Related InterviewSolutions

• A `4.0 kg` block is suspended from the celling of an elevator through a string having a linear mass density of `1.6 xx 10^(-2) kg//m`. Find (a) speed (with respect to the string) with which pulse can proceed on the string it he elevator accelerates up at the rate of `6 m//s`. (b) in part (a) at some instant speed of lift is `40 m//s` in upward direction, then speed of the wave pulse with respect to ground at that instant is (Take `= 10 m//s^(2)`)
• A sonometer wire of length `1.5m` is made of steel. The tension in it produces an elastic strain of `1%`. What is the fundamental frequency of steel if density and elasticity of steel are `7.7 xx 10^(3) kg//m^(3)` and `2.2 xx 10^(11) N//m^(2)` respectively ?A. `188.5 Hz`B. `178.2 Hz`C. `200.5 Hz`D. `770 Hz`
• If the tension in a string is increased by `21` percent, the fundamental frequency of the string changes by `15 Hz`. Which of the following statements will also be correct?A. The original fundamental frequency is nearly `150 Hz`B. The velocity of propagation changes nearly by `4.5%`C. The velocity of propagation changes nearly by `10%`D. The fundamental wavelength changes nearly by `10%`
• The same progressive wave is represented by two graphs I and II. Graph I shows how the displacement `y` varies with the distance x along the wave at a given time. Graph II shows how y varies with time t at a given point on the wave. The ratio of measurements AB to CD, marked on the curves represents:A. wave number `k`B. wave speed `V`.C. frequency `v`.D. angular frequency `omega`.
• A transverse periodic wave on a string with a linear mass density of 0.200 kg/m is described by the following equation `y=0.05 sin (420t-21.0 x)` where x and y are in metres and t is in seconds.The tension in the string is equal to :A. `32 N`B. `42 N`C. `66 N`D. `80 N`
• Derive an expression for the velocity of pulse in a in stretched in string under a tension `T` and `mu` is the mass per unit length of the sting.
• Graph shows three waves that are separately sent along a string that is stretched under a certain tension along x-axis. If `omega_(1),omega_(2) and omega_(3)` are their angular frequencies, respectively, then: A. `omega_(1) = omega_(3) gt omega_(2)`B. `omega_(1) gt omega_(2) gt omega_(3)`C. `omega_(2) gt omega_(1) = omega_(3)`D. `omega_(1) = omega_(2) = omega_(3)`
• A piano string having a mass per unit length equal to `5.00 xx 10^(3)kg//m` is under a tension of `1350 N`, Find the speed with which a wave travels on this string.
• A guitar string is `180 cm` long and has a fundamental frequency of `90 Hz`. Where should it be pressed to produce a fundamental frequency of `135 Hz`?
• A piano wire weighting `4 g` and having a length of `90.0 cm` emits a fundamental frequency corresponding to the `"Middle C" (v = 125 Hz)`. Find the tension in the wire.