Electromagnetism MCQs

When a lossy capacitor with a dielectric of permittivity E and conductivity a operates at a frequency co, the loss tangent for the capacitor is given by

A circular loop has its radius increasing at a rate of 2 m/s. The loop is placed perpendicular to a constant magnetic field of 0.1 Wb/m2. When radius of the loop is 2 m, the emf induced in the loop will be

Kirchhoff's current law for direct current is implicit in the expression

Poisson's equation for an inhomogeneous medium is

The input impedance of a loss-less transmission line is 100 ohms when terminated in a short-circuit, and 64 ohms when terminated in an open circuit. The characteristic impedance of the line is

Which one of the 'following sets of equations is independent in Maxwell's equations?

Two conducting shells of radii rt and r2 (ri r2), each with a charge 'Q' ar placed for apart in a uniform external electric field. The space surrounding each shell is filled with the same dielectric material.In this situation, the

Which of the following pairs of parameters and expressions is / are correctly matched? 1. Characteristic impedance ETH 2. Power flow density ....... V x1-1 3. Displacement current in non-conducting medium ....... E x1-1 Select the correct answer using the codes given below : Codes :

1f the electric field E = 0.1 te-t ax and ? -= 4E0, then the displacement current crossing an area of 0.1 m2 at t = 0 will be