1
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
A material has conductivity of 10-2 mho/m and a relative permittivity of 4. The frequency at which the conduction current in the medium is equal to the displacement current is
A
45 MHz
B
90 MHz
C
450 MHz
D
900 MHz
2
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
A transmission line is distortionless if
A
$$R\,L = {1 \over {G\,C}}$$
B
$$R\,L = G\,C$$
C
$$L\,G = R\,C$$
D
$$R\,G = L\,C$$
3
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
If a plane electromagnetic wave satisfies the equation $${{{\partial ^2}\,{E_x}} \over {\partial \,{z^2}}} = \,{c^2}{{{\partial ^2}\,{E_x}} \over {\partial \,{t^2}}},$$ the wave propagates in the
A
x-direction
B
z-direction
C
y-direction
D
x z plane at an angle of $${{{45}^ \circ }}$$ between the x and z directions
4
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
A uniform plane electromagnetic wave incident normally on a plane surface of a dielectric material is reflected with a VSWR of 3. What is the percentage of incident power that is reflected?
A
10%
B
25%
C
50%
D
75%
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