Exercise: Electromagnetic Field Theory
Questions for: Electromagnetic Field Theory
The electric field of the incident wave is 
, where ω = 3 x 109p and β = 10 p. The electric field of the transmitted wave Et is given by
, where ω = 3 x 109p and β = 10 p. The electric field of the transmitted wave Et is given by
A: 
B: 
C: 
D: 
Answer: C
In, question, it is not mentioned, about medium; dielectric etc.
Ei = Et + Er
Et = Er
Et = 
Ei.
A uniform plane wave is one in which
A: 
x 
= 0
x = 0B: .
. C: and are perpendicular
and are perpendicularD: and lie in a plane
and lie in a plane
Answer: D
For uniform plane wave, E and H must be in a plane but perpendicular to each other.
Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be
Answer: A
6 dB = 10 log10 
= 100.6 3.98
Pr = 3.98 mW.
A plane electromagnetic wave travels in dielectric medium of relative permittivity 9. Relative to free space, the velocity of propagation in the dielectric is
Answer: D
.
A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls calculate the phase velocity for dominant mode.
Answer: B
Vg . Vp = C2
where 
.
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