Q. Two phase induction motor can be used as AC tachometers.

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Q. Electrodynamic vibration transducers are based on _____________

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Q. Which of the following is used for measuring emf between plates of transducers?

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Q. Which of the following is applicable for the electromagnetic flow meter?

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Q. Which of the following quantities are sensitive to electromechanical flow meters?

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Q. Which of the following represents the expression of output from electromechanical flow meter?

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Q. Electromechanical system can be used for measuring vibration.

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Q. Which of the following is correct for AC and DC tachometers?

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Q. Which of the following is correct for the tachometer system?

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Q. Photoelectric devices are sensitive to all wavelength.

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Q. In photo emissive transducers, electrons are attracted by ___________

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Q. Why inert gas is used in photo electric transducers?

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Q. Which of the following quantities are insensitive to solid state semiconductor photoelectric transducers?

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Q. LDR’s are also called _______________

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Q. Photo resistive cells are _____________

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Q. Which of the following materials can be used as photoconductive transducer?

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Q. Semiconductor layer using silicon and germanium is known as _______________

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Q. Which of the following are used to form photo transistors?

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Q. Photo transistor is a three terminal device.

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Q. Which of the following are nuclear radiations?

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