Explain the term standing waves on a transmission line. How can we classify a standing wave?
Define electrical dipole and dipole moment.Five equal point charges of Q =20 x C are placed at x 5 and 6 cm. Calculate the potential at origin.

2.(a) Derive the transmission line equation.
An open-wire transmission line has R =4·5 kohm, L =0·15 mH, G =60 m mho,C =12 nF. Operating frequency MHz and the length of transmission line is 300 m. Find the propagation constant (Y),characteristic impedance and velocity of propagation

3.(a) What is a capacitor? Derive an expression for the capacitance of a spherical capacitor.
Find the current distribution producing the following field distribution using Ampere's law. <img src='./qimages/10901-3b.jpg'> Using Maxwell's equations, show that the free space wave equation in E is <img src='./qimages/10901-4a.jpg'> In free space, if <img src='./qimages/10901-4b.jpg'>

calculate the expression for E and determine the direction of propagation.

5.(a) A lossless transmission line has a characteristic impedance of 75 ohm and phase constant of 3 rad/m at 100 MHz. Find the inductance and capacitance of the line per metre.
Explain Standing-Wave Ratio and Reflection Coefficient with reference to EM wave.

6.(a) State and prove Poynting's theorem. Also give the physical interpretation of E x H.
Explain the physical significance of the following terms:

curl, gradient and divergence <img src='./qimages/10901-6b.jpg'> <br><br>

7. Write short notes on any two of the following:
Laplace and Poisson's equations Method of Images Gauss's Law of Electrostatics Displacement Current