State the Coulomb's law. Four identical charges of 30 J.1C each are located at the four comers of a square, the diagonal measures 8 m. Find the force on a 100 J.1C charge located 3 m above the centre of the square.

State and prove the Gauss divergence theorem and explain its physical significance and applications.

2. Two parallel conducting plates are separated by distance apart and filled with dielectric medium having relative permittivity Using Laplace's equation, derive an expression for capacitance per unit length of the parallel plate capacitor, if it is connected to a DC source supplying volts.

Write Laplace's equations in rectangular and cylindrical co-ordinates system.

(b)State and explain Ampere's circuital law and Stokes' theorem.

Write about the equation of Continuity and Inconsistency of Ampere's law.

Write down Maxwell's equations in free space for time varying and static fields in differential form.

5. Discuss the reflection of an electromagnetic wave from a perfect insulator incident diagonally and perpendicular.

Derive the expression for attenuation factor for electromagnetic waves between parallel conducting planes. Also explain the Snell's law of refraction of waves.

6. Explain the double stub method for impedance matching on a transmission line. What are the advantages of double stub over the single stub?

What is Smith's chart and why is it useful in making transmission line calculations?

7. Write short notes on any two of the following:

Biot-Savart's Law and its Applications

Gauss's Theorem

Wave Propagation in Dielectric and Conducting Media