A circular waveguide carries TE11 mode whole radial electric field is given by E

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Question
A circular waveguide carries TE₁₁ mode whole radial electric field is given by
E_r = E₀j₁(r) sin ? V/m
where r is radial distance in cm from the axis
The cut off wavelength is
Options
A. 10 cm
B. 3 p cm
C. 2 p cm
D. 8 cm

Correct Answer

10 cm

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3. In a circular waveguide with radius r, the dominant mode is
Options
A. TM₀₁
B. TE₀₁
C. TM₁₁
D. TE₁₁

4. Consider the following time parameters
1. Domain growth time constant.
2. Transit time.
3. Dielectric relaxation time in positive mobility regime.
Which of the above are used in connection width transferred electron device?
Options
A. 1, 2, and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

5. A disadvantage of microstrip line as the connections of compared to strip line is that former
Options
A. do not lend themselves to printed circuit
B. are more likely to radiate
C. are bulky
D. are more expensive and complex

6. A 75 ohm line is first short terminated and minima locations are noted. Then the short is replaced by resistive load and minima location are again noted. If minima location are not altered and VSWR is 3, the value of resistive load is
Options
A. 25 ?
B. 50 ?
C. 225 ?
D. 250 ?

9. Effect of loading of line is
Options
A. increase in Z₀, a and ?
B. increase in Z₀ and ? but decrease in a
C. decrease in Z₀, a and ?
D. decrease in Z₀ and ? but increase in a

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