Q. What is the expression for phase angle using X-Y plotter? (Assume t₀ be time interval between zero crossing of signals and T be time period of signals).

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Q. What is the use of flip-flop in electronic phase meters?

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Q. Phase-Sensitive detectors are used for measuring phase of ______________

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Q. Rejection capability of Phase sensitive detector is depended on the averaging time of smoothing filter.

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Q. For what purpose, FET’s are included in phase sensitive detectors?

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Q. Which of the following relation is correct for phase angle and reactive power?

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Q. Which of the following is the expression of power factor?

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Q. What is the relation for phase angle (in degree) of a signal with time delay Δt and frequency f?

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Q. Which of the following cannot be used as a unit for frequency?

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Q. Which of the following represents the correct relationship between frequency and angular frequency?

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Q. What will be the frequency of a system in which 35 events occur in 7 seconds?

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Q. Which of the following device can be used for measurement of frequency?

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Q. All waves in electromagnetic spectrum has the same speed in vacuum.

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Q. Which of the following frequency range represents an audible frequency range of humans?

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Q. Which of the following is the correct relationship between speed of light in vacuum and frequency of light?

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Q. In a dispersive medium, speed of light depends on frequency.

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Q. Which of the following range represents frequency range of rainbow colors?

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Q. What will be the frequency of the signal A sin (4πt+ɸ)?

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Q. In a time interval measuring device, two pulses are used ______________

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Q. Start and stop pulses are produced by ______________

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