Electronic Instruments - MCQs with answers

Electronic Instruments - MCQs with answers

Q1. To increase the current sensitivity below 10 mV, electronic instrument uses

A. Amplifiers
B. Modulator
C. Transducer
D. Oscillator

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Q2. Electronic voltmeters can be designed to measure

A. Only very small voltages
B. Only very high voltages
C. Both very small and very high voltages
D. None of these

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Q3. An rms reading voltmeter can accurately measure voltages of

A. Sine waveforms
B. Square waveforms
C. Saw tooth waveforms
D. All of these

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Q4. In electronic voltmeter, the range of input voltages can be extended by using

A. Functional switch
B. Input attenuator
C. Rectifier
D. Balanced bridge dc amplifier

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Q5. The measurement range of digital voltmeter is

A. 1V to 1MV
B. 1V to 1kV
C. 1kV to 1MV
D. 100 kV to 100MV

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Q6. Which among the following is not the type of digital voltmeters?

A. Ramp type
B. Integrating
C. Potentiometric type
D. None of these

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Q7. In a ramp type DVM, the multivibrator determines the rate at which the

A. Clock pulses are generated
B. Measurement cycles are initiated
C. It oscillates
D. Its amplitude varies

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Q8. In potentiometric type DVM, the adjustment of sliding contact is done by

A. A single phase servomotor
B. Two phase servomotor
C. Three phase servomotor
D. All of these

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Q9. In the beginning, all the outputs of the successive approximation type register is at

A. Logic zero
B. Logic one
C. Toggling
D. None of these

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Q10. Q meter is used to measure the properties of

A. Inductive coils
B. Non inductive coils
C. Capacitive coils
D. Both (a) and (c)

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