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Important Questions for "electromagnetic theory":

[1]

  1. Write down the electromagnetic wave equation and its general solution with clear meaning of terms used.
  2. Prove Biot-Savart law and derive an expression for the magnetic field intensity at a distance r from a straight current-carrying wire of finite length. What will be the magnetic field intensity when length is very long?
  3. Derive an expression for the intensity distribution due to Fraunhofer diffraction at a single slit and show that relative intensities of successive maxima are nearly 1:4/9 : 4/25 : 4/49.

[2]

  1. Explain the difference between magnetic force and electric force.
  2. Prove that: div. B = 0
  3. State and explain Kirchhoff's law of electrical network.

[3]

  1. Write the equation for conservation of charge in a medium.
  2. Show that Maxwell's equations for an electromagnetic field can be written as a pair of inhomogeneous wave equations involving scalar and vector potentials.
  3. Deduce expressions for electric and magnetic fields of an oscillating electric dipole.

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