1
GATE ECE 2003
MCQ (Single Correct Answer)
+1
-0.3
The depth of penetration of electromagnetic wave in a medium having conductivity $$\sigma $$ at a frequency of 1 KHz is 25 cm. The depth of penetration at a frequency of 4 KHz will be
A
6.25 cm
B
12.50 cm
C
50.00 cm
D
100.00 cm
2
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
3
GATE ECE 2000
MCQ (Single Correct Answer)
+1
-0.3
A TEM wave is incident normally upon a perfect conductor. The E and H fields at the boundary will be respectively
A
minimum and minimum
B
maximum and maximum
C
minimum and maximum
D
maximum and minimum
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The intrinsic impedance of copper at high frequencies is
A
purely resistive.
B
purely inductive.
C
complex with a capacitive component.
D
complex with an inductive component.
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