EMT

EMT - ECE - MADEEASY-2010
Question:-
Option (A)
(1/2π)m
Option (B)
(1/π)m
Option (C)
π m
Option (D)
2π m
Correct Option:
A
Question Solution:
The distance δ through which the amplitude of a travelling wave decreases by a factor e-1 called skin depth and given as,
δ = 1/α
For good conductor,
α = β = (πfμσ)1/2
then δ = 1/β  = λ/2π
Given λ = 1m
therefore, δ = 1/2π meter.
Question:-
Option (A)
curl(A)=H
Option (B)
curl(A)=B
Option (C)

Option (D)
curl(B)=0
Correct Option:
D
Question:-
Option (A)
TM01
Option (B)
TM10
Option (C)
TM11
Option (D)
TM12
Correct Option:
C
Question Solution:
(a) λc = 2b
(b) λc = 2a
(c) λc =
so, λ c (TM11) < λ c (TM01) < λc (TM10)
Question:-
Option (A)
Linear
Option (B)
Circular
Option (C)
Elliptical
Option (D)
unpolarised
Correct Option:
B
Question Solution:
E1 = E2 = E0
θ = π/2
Conservative so circular polarization