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)
TM_{01}
Option (B)
TM_{10}
Option (C)
TM_{11}
Option (D)
TM_{12}
Correct Option:
C
Question Solution:
(a) λ_{c} = 2b
(b) λ_{c} = 2a
(c) λ_{c} = _{}
so, λ _{c} (TM_{11}) < λ _{c} (TM_{01}) < λ_{c} (TM_{10})
Question:-
Option (A)
Linear
Option (B)
Circular
Option (C)
Elliptical
Option (D)
unpolarised
Correct Option:
B
Question Solution:
E_{1} = E_{2} = E_{0}
_{}θ = π/2
Conservative so circular polarization