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4. a) The one dimensional wave equation for the variable y(z, t) can be written as:...
[132 2 2 3 4 17 marks] Question 4 A plane wave is travelling in a vacuum in the +z-direction with wavenumber k and angular frequency . It is linearly polarised in the x-direction, and has electric field given by E(t, z) Eo Cos(kz - wt)f This wave is normally incident on a perfectly electrically conducting, semi-infinite slab in the region z > 0 and the resulting field in vacuum (z < 0) is a superposition of the incident and...
5. Calculate the polarization angles (y, χ) for the wave E(z,t)- f 3 cos(ωt-kz) + 93 cos(wt-k2+ 450) (V/m). Plot E(0, t) to show the polarization state.
5. Calculate the polarization angles (y, χ) for the wave E(z,t)- f 3 cos(ωt-kz) + 93 cos(wt-k2+ 450) (V/m). Plot E(0, t) to show the polarization state. 5. Calculate the polarization angles (y, χ) for the wave E(z,t)- f 3 cos(ωt-kz) + 93 cos(wt-k2+ 450) (V/m). Plot E(0, t) to show the polarization state.
Consider the following CT periodic signals x(t), y(t) and z(t) a(t) 5 -4 y(t) 5/-4 z(t) 5 4 (a) [2 marks] Find the Fourier series coefficients, ak, for the CT signal r(t), which is a periodic rectangular wave. You must use the fundamental frequency of r(t) in constructing the Fourier series representation (b) [2 marks] Find the Fourier series coefficients, bk, for the CT signal y(t) cos(t) You must use the fundamental frequency of y(t) in constructing the Fourier series...
(a) The differential equation describing the motion of a stretched string 4. can be writ- ten y T Define the symbols that appear in this equation. [3 marks] (b) A uniform stretched string has length 2 m, mass 40 g and a fundamental fre- quency of 75 Hz. [4 marks] (i) Calculate the tension in the string. (ii) Write explicit expressions for the two lowest frequency normal modes of the string and sketch their shapes. (iii) The string is pulled...
0.0/10,0 Torsional vibration of a shaft is governed by the wave equation, 4 where e(z,t) is the angular displacement (angle of twist) along the shaft, r is the distance from the end of the shaft and t is time. For a by frictionless bearings at each end, the boundary conditions are x(0,)0(2w,t) 0, t> 0. Suppose that the initial angular displacement and angular velocity are (r,0)2 cos (4z), e(z,0) 3+3cos(4r), 0< z < 2x, respectively You may use the result...
Torsional vibration of a shaft is govened by e wave equation where e(z,t) is the anqular displacement (angle of twist) along the shaft, z is the distance from the end of the shaft and t is time. For a shaft of length that is supported by frictionless bearings at each end, boundary conditions are 0(0,t) 0(4x,t) 0, t> 0. Suppose that the initial angular displacement and angular velocity are e(z,0) 3cos(2r), 0(z,0)= 4+cos(2r), 0<z< 4m, respectively You may use the...
Torsional vibration of a shaft is govened by e wave equation where e(z,t) is the anqular displacement (angle of twist) along the shaft, z is the distance from the end of the shaft and t is time. For a shaft of length that is supported by frictionless bearings at each end, boundary conditions are 0(0,t) 0(4x,t) 0, t> 0. Suppose that the initial angular displacement and angular velocity are e(z,0) 3cos(2r), 0(z,0)= 4+cos(2r), 0<z< 4m, respectively You may use the...
A wave traveling along a string is described by rad y (z, t)-(5.00 mm) sin ( kx + ( 500 ) t + ф How much time (in milliseconds) does any given point on the string take to move between displacements y- +2.00 mm and y- -2.00mm?
)Consider the wave equation for a vibrating string of semi-infnite length with a fixed end at z = 0, t > 0 a(0,t) = 0, and initial conditions 0 < x < oo u(z,0) = 1-cos(nz), ut(x,0) = 0, Complete the table below with the values of u(0.5, t) at the specified time instants 0.5 0.5 x 0.5 0.5 0.5 2 0.5 0.75 t 0.25 u(x,t) )Consider the wave equation for a vibrating string of semi-infnite length with a fixed...