Engineering, 25.09.2020 02:01 blumkemax8
The instantaneous expression for the electric field in a uniform plane electromagnetic wave (UPEMW) propagating in vacuum is given to be E(z, t) = ix Ez(z, t) where Ez(z, t) = 5 cos[21.109t + (20n/3)z -60°), mV/m. [4] If the wave in problem [3] now instead propagates in a lossless dielectric medium, what will be the instantaneous expression for the wave electric field if you are given that the relative refractive index ny of the medium of propagation is 3. You may assume the same amplitude of 5 for the electric field and the same frequency and polarization of the wave as in problem k. Also assume the same phase factor of 600 in the expression of the electric field. NOTE: As you may recall from your study of physics, the term relative refractive index ny of the propagation medium is defined by the ratio n = c/ph>=1, i. e., ny represents a velocity reduction factor relative to the velocity of the EM wave in vacuum. Thus, the velocity of EM wave in a dielectric medium is simply equal to the velocity of EM wave in vacuum c = 3.108 m/s divided by ny. It should be apparent that an EM wave propagating in a dielectric (or insulating) medium has a shorter wavelength than an EM wave of the same frequency propagating in vacuum as dictated by the relationship 2.4 = Vrh,
Answers: 3
Engineering, 03.07.2019 14:10
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Engineering, 04.07.2019 18:10
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
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Engineering, 04.07.2019 18:10
Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k
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The instantaneous expression for the electric field in a uniform plane electromagnetic wave (UPEMW)...
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