Tiêu đề 1. AEMT Solved Qp December 2017 Leaked postpone-KtuQbank .pdf ✅

B B7034 Page 1 of 1 Total Pages: 1 Reg No.:_______________ Name:__________________________ APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY FIFTH SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2017 Smith Chart to be supplied on request. PART A Answer any two full questions, each carries 15 marks. 1 a) Derive the expressions for Energy stored in Electric Field. (8) b) Eight identical charges,Q each are placed on the corners of a cube of side ‘a’. Find the resultant force on a charge. (7) 2 a) Derive Maxwell’s first and second equations from fundamental laws. (8) b) Starting from Maxwell equation, derive the wave equation for a conducting medium. (7) 3 a) Determine the inductance of a Two- wire transmission line. (5) b) A Parallel plate capacitor with plate area of 5cm2 and a plate separation of 3mm has a voltage 50sin103 t Volt applied to its plates.Calculate the displacement current assuming ε = 2ε0. (4) c) Derive the boundary conditions for electric field at the interface of two dielectrics. (6) PART B Answer any two full questions, each carries 15 marks. 4 a) State Poynting theorem. Derive the equation of complex vector. (8) b) A lossless 50-Ω transmission line is terminated in a load with ZL = (50+ j25) Ω. Calculate (i) The reflection coefficient Γ. (ii) The standing-wave ratio. (7) 5 a) Derive the input impedance of a transmission line. For a shorted section of 75 ohm transmission line, l = λ/4, Find the input impedance assuming α =0. (7) b) Differentiate circular and elliptical polarization. (8) 6 a) Derive standard Transmission line equations. (6) b) Derive Brewster angle.A parallel-polarized plane wave is incident from air onto a dielectric medium with εr = 9 at the Brewster angle. What is the refraction angle? (9) PART C Answer any two full questions, each carries20 marks. 7 a) A lossless transmission line with Z0=50Ω is 30m long and operates at 2MHz. The line is terminated with a load ZL=60+j40Ω. If u=0.6c on the line, find i)Reflection coefficient ii) Standing wave ratio iii) Input impedance (15) b) Discuss the attenuation of waveguides. (5) 8 a) Explain single stub matching in detail using analytical method. (12) b) Explain Group velocity and Phase velocity. When a wave of 6GHz propagates in parallel conducting plates separated by 3cm, find the VP and Vgof the wave for dominant wave. (8) 9 a) Explain waveguides and its different modes of wave propagation. (10) b) Explain Half Wave and Quarter Wave Transmission lines. Given that ZL=30+j40Ω, Z0=50Ω. Find the shortest length (‘l’) and point where stub has to be placed for a matching. (Use Smith chart) (10) **** Course Code: EC303 Course Name: APPLIED ELECTROMAGNETIC THEORY (EC) Max. Marks: 100 Duration: 3 Hours KTUQBANK.COM
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The total force at the point observed (at origin) is the sum of the seven other vertices of the cube. As we are concerned with the magnitude we can neglect the vector KTUQBANK.COM