The frequency of oscillation in a backward wave oscillator can be chan – McqOptions

MCQOPTIONS

1.	The frequency of oscillation in a backward wave oscillator can be changed by
A.	varying the voltage which controls beam velocity
B.	varying the beam current
C.	both by varying the beam current and by light varying the voltage which controls beam velocity
D.	changing the rate of thermionic emission
Answer» B. varying the beam current

Discussion

No Comment Found

Related MCQs

Characteristic impedance of a coaxial cable is inversely proportional to ∈r.
Assertion (A): In rectangular waveguide TE01 mode is just TE10 mode rotated by 90°.Reason (R): When a rectangular waveguide is rotated by 90°, the broad and narrow dimensions get interchanged.
Consider the following applications SwitchAttenuatorPhase shifterOscillator In which of the above can a PIN diode be used?
In the given figure the equivalent circuit of a T attenuator. If the condition for matched attenuator is
A microstrip line has ∈r = 9. The normalised wavelength is about
A circular waveguide carries TE11 mode whole radial electric field is given byEr = E0j1(r) sin Φ V/mwhere r is radial distance in cm from the axisThe cut off wavelength is
Guide wavelength (λg), cutoff wavelength (λc) and free space wavelength (λ0) of a waveguide are related as
If ZTE is wave impedance for TE waves, Ed is maximum dielectric strength of insulating material, a and b are the width and height of a rectangular wave guide, the maximum power handling capability Pmax for TE10 mode is
If a and b are the width and height of rectangular wave-guide the cut off wavelength λc for TE20 mode is equal to
For a rectangular waveguide having width a and height b, the cutoff wavelength for TM11 mode is equal to