Q3.Consider the following statements regarding the complex Poynting vector for
the power radiated by a point source in an infinite homogeneous and lossless
medium. Re() denotes the real part of denotes a spherical surface whose
centre is at the point source, and denotes the unit surface normal on S.
Which of the following statements is TRUE?
Answer : Option CExplaination / Solution:
Power radiated from any source is constant.
Q4.Consider a closed surface S surrounding volume V. If is the position vector
of a point inside S, with the unit normal on S, the value of the integral is
Answer : Option DExplaination / Solution:
From Divergence theorem, we have
Q5.A current sheet lies on the dielectric interface x = 0
between two dielectric media with εr1 = 5, μr1 = 1 in Region -1 (x < 0) and εr2 = 5, μr2 = 2 in Region -2(x > 0) . If the magnetic field in Region-1 at
x = 0- is the magnetic field in Region-2 at x = 0+ is
Answer : Option AExplaination / Solution:
From boundary condition
Q6.The electric and magnetic fields for a TEM wave of frequency 14 GHz in a
homogeneous medium of relative permittivity εr and relative permeability
Assuming the speed of light in free space to be 3 × 108 m/s, the intrinsic
impedance of free space to be 120π, the relative permittivity εr of the medium
and the electric field amplitude Ep are
Answer : Option DExplaination / Solution:
From the expressions of we can write,
Q7.The current density in a medium is given by The total current and the average current density flowing through the portion of a spherical
surface r = 0.8 m, are given, respectively, by
Answer : Option AExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0