31. High frequency transistors are designed especially for:
32. A distortion analyzer uses twin-T filter to
33. The maximum usable frequency of an ionospheric layer at 60° incidence and with 8 MHz critical frequency is
34. The cut-off frequency of the dominant mode of a rectangular waveguide having aspect ratio more than 2 is 10 GHz. The inner broad wall dimension is given by
35. For which of the following reasons the TWT is sometimes preferred to the multi-cavity klystron amplifier?
36. A rectangular waveguide having TE10 mode as dominant mode is having a cutoff frequency of 18-GHz of the TE30 mode. The inner broad-wall dimension of the rectangular waveguide is
37. The dominant mode in a rectangular waveguide is TE10, because this mode has
38. A cylindrical cavity operating in TE111 mode has a 3 dB bandwidth of 2.4 MHz and its quality factor is 4000. Its resonant frequency would be
39. Which of the following statements is not true of waves in general
40. An H-plane tee is also known as
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