Electromagnetism MCQs

Question 1

Polarization of an EM wave is taken as

Accepted Answer

direction of the electric field

Answer

direction of the magnetic field the

Answer

normal to the direction of magnetic field

Answer

normal to the direction of the electric

Question 2

The EM field and current are field concentrated close to the surface of the conductor. The phenomenon is called

Accepted Answer

Skin effect

Answer

Faraday's effect

Answer

EM concentration effect

Answer

Ohm's effect

Question 3

When EM waves are propagated in a rectangular waveguide

Accepted Answer

they are reflected from the walls but do not travel along the walls.

Answer

they travel along the broader walls of the waveguide

Answer

they travel through the dielectric without touching the walls

Answer

they travel along all the four walls of the waveguide

Question 4

The average power flow per unit area in a uniform plane wave in an electric field of maximum voltage E0 and impedance2Eo

Accepted Answer

10E0Zo

Question 5

When EM waves are perfect conductor, there results incident wave

Accepted Answer

a standing wave which is not progressing

Answer

a stronger

Answer

a stronger reflected wave is

Answer

a weak reflected wave

Question 6

Brewster angle is the angle

Accepted Answer

none of these

Answer

for which there is reflection and the Incident wave is horizontally polarized

Answer

for which there is no reflection and the incident wave is vertically polarized

Answer

given by OB = tan C'

Question 7

Transverse electric (TE) waves have

Accepted Answer

magnetic field component H in the direction of propagation and no direction component of electric field E in this

Answer

electric component E in the direction of propagation and no component of magnetic field H in this direction

Answer

both electric field component E and magnetic field component H in the direction of propagation

Answer

none of these

Question 8

Transverse magnetic (TM) waves have

Accepted Answer

electric field component E in the direction of propagation and no direction component of magnetic field H in this

Answer

magnetic field component H in the direction of propagation and no component of electric field E in this direction

Answer

both magnetic field component H and the electric field component E in the direction of propagation

Answer

neither magnetic field component H nor electric field component E in the direction of propagation

Question 9

In a rectangular waveguide, the following types of wave can exist

Accepted Answer

both TE and TM waves

Answer

TE only

Answer

TM only

Answer

TEM only