1
GATE ECE 2009
MCQ (Single Correct Answer)
+1
-0.3
Which of the following statements is true regarding the fundamental mode of the metallic waveguides shown? GATE ECE 2009 Electromagnetics - Waveguides Question 38 English
A
Only P has no cutoff- frequency
B
Only Q has no cutoff-frequency
C
Only R has no cutoff-frequency
D
All three have cutoff-frequencies
2
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
The phase velocity of an electromagnetic wave propagating in a hollow metallic rectangular waveguide in the $$T{E_{10}}$$ mode is
A
equal to its group velocity
B
less than the velocity of light in free space
C
equal to the velocity of light in free space
D
greater than the velocity of light in free space
3
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
The phase velocity for the $$T{E_{10}}$$ mode in an air-filled rectangular waveguide is
A
less than c
B
equal to c
C
greater than c
D
none of the above
4
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
The dominant mode in a rectangular waveguide is $$T{E_{10}}$$, because this mode has
A
no attenuation
B
no cut-off
C
no magnetic field component
D
the highest cut-off wavelength

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