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Electromagnetics
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1
GATE ECE 2014 Set 3
Numerical
+1
-0
Consider an air filled rectangular waveguide with a cross-section of $$5\,\,cm\,\, \times \,\,3\,cm$$. For this waveguide, the cut-off frequency (in MHz) of $$T{E_{21}}\,$$ mode is __________________
Your input ____
2
GATE ECE 2011
MCQ (Single Correct Answer)
+1
-0.3
The modes in a rectangular waveguide are denoted by $$T{E_{mn}}\,$$/$$T{M_{mn}}\,$$ where m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively. Which one of the following satements is TRUE?
A
The $$T{M_{10}}\,$$ mode of the waveguide does not exist
B
The $$T{E_{10}}\,$$ mode of the waveguide does not exist
C
The $$T{M_{10}}\,$$ and the $$T{E_{10}}\,$$ modes both exist and have the same cut-off frequencies
D
The $$T{M_{10}}\,$$ and the $$T{M_{01}}\,$$ modes both exist and have the same cut-off frequencies.
3
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 36 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
4
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
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Questions Asked from Marks 1
GATE ECE 2014 Set 3 (1) GATE ECE 2011 (1) GATE ECE 2009 (1) GATE ECE 2004 (1) GATE ECE 2002 (1) GATE ECE 2001 (2) GATE ECE 1999 (1) GATE ECE 1997 (1) GATE ECE 1994 (1)
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics