Home » Uncategorized » Electromagnetic Waves GATE Questions and Answers

# Electromagnetic Waves GATE Questions and Answers

1.  A plane electromagnetic wave travelling along +z direction, it has its electric field given by

$E_x$= 2 $cos(\omega t)$  and

$E_y$= 2 $cos(\omega t+90)$

the wave is

a) Linearly polarized

b) Elliptically polarized

c) Left circularly polarized

d) Right circularly polarized

2) The electric field of an electromagnetic wave propagating in the positive z direction is

$E$ =$i sin( \omega t$$\beta z)$$i sin( \omega t$$\beta z +90)$ The wave is

a) Linearly polarized in the Z direction

b) Elliptically polarized

c) Left Hand circularly polarized

d) Right Hand circularly polarized

3) The electric field of a uniform plane electromagnetic wave in free space, along the positive x direction, is given by

E =$10(a_y +j a_z)$ $e^{-j25x}$

The frequency and polarization of the wave are

a) 1.2 GHz and left circular
b) 4 GHz and left circular
c) 1.2 GHz and right circular
d) 4 GHz and right circular

4) A plane wave propagating in the dielectric medium has an electric field given as
Ex  = E0Cos (2.6×1010t -100z). The phase velocity of plane wave is:

a) $10^6 m/s$

b) $2.6*10^8 m/s$

c) $3*10^8 m/s$

d) $2.6*10^{12} m/s$