STUPIDSID
Solve any four:
1 (a)
State and explain Coulomb's law.
5 M
1 (b)
Derive Poisson's and Laplace equation.
5 M
1 (c)
What is intrinsic impedance of free space?
5 M
1 (d)
Define directive gain and directivity with respective antenna. An antenna has a directivity of 20 and a radiation efficiency of 90% compute the gain in dBs.
5 M
1 (e)
Find out the divergence and curl of the following function. \[ \overline{A}=2xy\overline{ax}+(x^2z)\overline{ay}+z^3 \overline {az} \]
5 M
2 (a)
Given the potentials V=2x2y-5xz and a point P(-4, 3, 6) find V,E,D and e, at point P.
10 M
2 (b)
Derive boundary conditions for electric fields at the boundary of two dielectric media.
10 M
3 (a)
Derive Maxwell's integral and point form equations for time varying fields.
10 M
3 (b)
Prove \(\nabla, \overline{D} = e_v.\)
10 M
4 (a)
In a media characterized by σ=0, μ=μ0 and ε=ε0 \[ \overline{E}=20 \sin (10^8 t-\beta z)\overline {ay} \ \text{v/m.} \text{ find}\beta \text{ and }\overline {H}. \]
10 M
4 (b)
Derive the expression for the reflection and transmission coefficients in case of reflection from perfect dielectric at oblique incidence.
10 M
5 (a)
Explain in detail MOM method also state advantage and drawback of it.
10 M
5 (b)
State and derive the Poynting theorem and describe the significance of each term.
10 M
6 (a)
What is line of sight propagation? Obtain the expression for range of line of sight for space wave propagation in terms of antenna's transmitting and receiving heights.
10 M
6 (b)
Explain ground wave, space wave propagations.
10 M
6 (c)
Derive an expression for radiation resistance of an small loop antenna. Explain its significance.
10 M
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