Q.1
The tangential component of an electric field will be continuous in which boundary?
  • a) Conductor-Conductor
  • b) Conductor-Dielectric
  • c) Dielectric-Dielectric
  • d) Any boundary
Q.2
The depth of penetration of a wave in a lossy dielectric increases with increasing
  • a) Conductivity
  • b) Permeability
  • c) Wavelength
  • d) Permittivity
Q.3
Magnetic vector potential is a vector
  • a) Whose curl is equal to the magnetic flux density
  • b) Whose curl is equal to the electric field intensity
  • c) Whose divergence is equal to electric potential
  • d) Which is equal to the vector product E x H
Q.4
For the wave equation E = 10sin (wt-5z)ax, the wave propagation will be in the direction of
  • a) Y direction
  • b) Z direction
  • c) X direction
  • d) XY direction
Q.5
An electric field on a plane is described by its potential V = 20(r-1 + r-2), where r is the distance from the source. The field is due to
  • a) A monopole
  • b) A dipole
  • c) Both a monopole and a dipole
  • d) A quadruple
Q.6
The electric field strength at a far-off point P due to a point charge, +q located at the origin O ismilliVolt/meter. The point charge is now enclosed by a perfectly conducting hollow metal sphere with its centre and the origin O. The electric field strength at the point, P is
  • a) Remains unchanged in its magnitude and direction
  • b) Remains unchanged in its magnitude but reverse in direction
  • c) Would be that due to a dipole formed by the charge, +q, at O and -q induced
  • d) Would be zero
Q.7
The electric field of a uniform plane electromagnetic wve in free space, along the positive direction, is given by E = 10(ay + jaz)e-j25x. The frequency and polarization of the wave, respectively are
  • a) 1.2 GHz, left circular
  • b) 4 GHz, left circular
  • c) 1.2 GHz, right circular
  • d) 4 GHz, right circular
Q.8
Identify which one of the following will NOT satisfy the wave equation.
  • a) 50ej(wt – 3z)
  • b) sin(w(10z + 5t))
  • c) cos(y2 + 5t)
  • d) sin x cos t
Q.9
The intrinsic impedance of copper at high frequencies is
  • a) Purely resistive
  • b) Purely inductive
  • c) Complex with a capacitive component
  • d) Complex with a inductive component
Q.10
A loop is rotating about the y axis in a magnetic field B = Bocos(wt + α)at. The voltage in the loop is
  • a) Zero
  • b) Due to rotation only
  • c) Due to transformer action only
  • d) Due to both rotation and transformer action
0 h : 0 m : 1 s