JNTU B.Tech II Year ELECTROMAGNETIC THEORY AND TRANSMISSION LINES Previous Question Paper (December - 2017 - R13)

Find Electric field intensity due to the charge distribution ρv.

Write poisson’s and Laplace equations.

State Biot-Savart’s law.

Calculate the self inductance per unit length of an infinitely long solenoid.

Write a wave equation in a lossy, charge free medium based on Maxwell’s Equation.

What is Brewster angle? Write its equation.

What is condition for distortion less transmission line?

Explain how Quarter wave transformer is used for matching?

What is the value of characteristic impedance and reflection coefficient for an open circuited line?

What are the characteristics of smith chart?

Point charges 5nC and -2nC are located at (2,0,4) and (-3,0,5), respectively. Find the electric field at (1,-3,7).

Given that E=(3x²+y)a_x+xa_y kV/m, find the work done in moving a –2µC charge from (0,5,0) to (2,-1,0) by taking the path.

An electric dipole of 100a_zpC.m is located at the origin. Find V and E at point (1,π/3,π/2).

Three point charges -1nC, 4nC, and 3nC are located at (0,0,0),(0,0,1) and (1,0,0) respectively. Find the energy in the system.

A circular loop located on x²+y²=9, z=0 carries a direct current of 10A along a_φ. Determine H at (0,0,4) and (0,0,-4).

In a certain conducting region, H=yz(x²+y²)a_x-y²xza_y+4x²y²a_z mA/m. Determine J at (5,2,-3).

State Maxwell’s equations in an integral and word form.

A unit normal vector from region 2 (µ=2µ₀) to region 1 (µ=µ₀) is a_n21=(6a_x+2a_y-3a_z)/7. If H₁=10a_x+a_y+12a_z A/m and H₂=H_2xa_x-5a_y+4a_z A/m. Determine H_2x.

A lossy material has µ=5µ₀, ε=ε₀. If at 5 MHz, the phase constant is 10 rad/m, calculate the loss tangent, conductivity of the material, complex permittivity attenuation constant and intrinsic impedance.

Derive the equation for intrinsic impedance in lossless dielectrics.

Determine the Fresnel coefficients for oblique incidence from lossless medium 1 to lossless medium 2 for parallel polarization.

Region 1 is a lossless medium for which y ≥ 0, µ=µ₀, ε=4ε₀, whereas region 2 is free space, y ≤ 0. If a plane wave E=5cos(10⁸t+βy)a_z V/m exists in region 1, find the time average pointing vector.

A transmission line operating at 500MHz has Z₀=80Ω, Propagation constant=0.04 Np/m, β=1.5 rad/m. Find the line parameters R, L, G and C?

Find the Z_in at any point on the line in terms load impedance starting from voltage and current wave equations on line.

For a lossless two wire transmission line show that the Characteristic impedance given.

A lossless transmission line operating at 4.5GHz has L=2.4µH/m and Z₀=85Ω. Calculate the phase constant and the phase velocity.

A 500Ω lossless line has V_L=10e^j25 V and Z_L=50e^j30Ω. Find the current at λ/4 from the load?

A 60 Ω air line operating at 20MHz is 10m long. If the input impedance is 90 +j150Ω. Calculate Z_L, Γ and S.