Q. Waveguides look like _________ cross-section pipes with dimensions of the order of the wavelength to be transmitted.

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Q. Klystron can generate power in which of the following ranges?

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Q. Microwave frequency can be tuned over a small range by adjusting the distance between which of the following?

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Q. Microwaves are generated by __________ and the power level is adjusted with the ________

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Q. Which of the following is also known as reflex oscillator?

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Q. Microwaves reflected back from the cavity are routed to which of the following?

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Q. Which of the following routes are the microwaves entering from the klystron towards the cavity?

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Q. By introducing which of the following, signal-to-noise ratio can be improved?

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Q. Which of the following is adjusted as a fine control for frequency tuning?

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Q. In basic ESR spectrometer, the cavity length is adjustable.

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Q. The cavity resonant frequency should be equal to which of the following?

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Q. When klystron frequency is close to the cavity resonant frequency, much less power is reflected from the cavity to the diode.

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Q. From which of the following are electrons emitted in the klystron tube?

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Q. Which of the following is the operating frequency of the ESR spectrometer?

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Q. At which of the following frequencies is the magnetic field at the sample modulated?

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Q. The output of the klystron does not pass through which of the following?

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Q. Which of the following is used as detector crystal in ESR spectrometer?

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Q. After detection, the resulting signal will have which of the following frequencies?

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Q. Which of the following is the modulation amplitude range of ESR spectrometer?

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Q. In which of the following ranges will the receiver time constant of the ESR spectrometer lie?

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