Exercise: Electromagnetic Field Theory
Questions for: Electromagnetic Field Theory
A line of characteristic impedance z0 ohms, phase velocity VP = 2 x 108 m/sec and length l = 2 m is terminated by a load impedance zL Ohms. The reflection coefficients at the input end and load end are respectively 
for a frequency of 50 MHz will be
for a frequency of 50 MHz will be
Answer: A
ri 
.
The magnetic field intensity vector of a plane wave is given by 
(x, y, z, t) = 10 sin (5000t + 0.004x + 30 
), where denotes unit vector in y direction the wave is propagating with a phase velocity.
(x, y, z, t) = 10 sin (5000t + 0.004x + 30 ), where denotes unit vector in y direction the wave is propagating with a phase velocity.
Answer: C
(x, y, z, t) = 10 sin (5000t + 0.004x + 30)
Wave is propagating in - ve direction, hence
v = - 1.25 x 107 m/sec.
Which of the following relations is valid?
A:
∇ x ∇ x 
= ∇(∇ . ) - ∇2 A
= ∇(∇ . ) - ∇2 AB:
∇ x ∇ x = ∇(∇ x ) - ∇2 A
= ∇(∇ x ) - ∇2 AC:
∇ x ∇ x = ∇2 A - (∇)
= ∇2 A - (∇)D:
none of the above
Answer: A
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