Electronics and Communication Engineering - Electromagnetic Field Theory
Exercise : Electromagnetic Field Theory - Section 3
- Electromagnetic Field Theory - Section 1
- Electromagnetic Field Theory - Section 2
- Electromagnetic Field Theory - Section 3
- Electromagnetic Field Theory - Section 4
- Electromagnetic Field Theory - Section 5
- Electromagnetic Field Theory - Section 6
- Electromagnetic Field Theory - Section 7
- Electromagnetic Field Theory - Section 8
- Electromagnetic Field Theory - Section 9
- Electromagnetic Field Theory - Section 10
- Electromagnetic Field Theory - Section 11
- Electromagnetic Field Theory - Section 12
- Electromagnetic Field Theory - Section 13
6.
∇ . 
= 0 is frequently known as
= 0 is frequently known asAnswer: Option
Explanation:
Equation of continuity
∇ x J = 0.
7.
A rhombic antenna is a
8.
Which of the following relations is valid?
∇ x ∇ x 
= ∇(∇ . ) - ∇2 A
= ∇(∇ . ) - ∇2 A∇ x ∇ x = ∇(∇ x ) - ∇2 A
= ∇(∇ x ) - ∇2 A∇ x ∇ x = ∇2 A - (∇)
= ∇2 A - (∇)none of the above
9.
Diffraction of electromagnetic waves
10.
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: Option
Explanation:
(x, y, z, t) = 10 sin (5000t + 0.004x + 30)
Wave is propagating in - ve direction, hence
v = - 1.25 x 107 m/sec.
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