If the repeller voltage in a klystron oscillator is increased the transit time o

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Question
If the repeller voltage in a klystron oscillator is increased the transit time of electron
Options
A. will be increased
B. will be decreased
C. will remain the same
D. either (a) or (b)

Correct Answer

will remain the same

Microwave Communication problems

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1. 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

4. 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 ?

5. 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

7. Assertion (A): Bolometer is frequently used in microwave power measurement.
Reason (R): In a bolometer the input microwave power causes a change in resistance.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

8. The rotation of direction of E field of a linearly polarized wave passing through a magnetised ferric medium is called
Options
A. Lorentz rotation
B. Faraday rotation
C. Steinmitz rotation
D. Fleming's rotation

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