MEASUREMENT AND INSTRUMENTATION QUIZ

What is the expression for momentum?

mass × velocity

mass × acceleration

force × displacement

change of velocity / time

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A spring-controlled moving iron voltmeter draws a current of 1 mA for full scale value of 100V. If it draws a current of 0.5 mA, the meter reading is

200 V.

100 V.

50 V.

25 V.

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An Ohmmeter is a

None of the listed here

Moving coil instrument

Dynamometer instrument

Moving iron instrument

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Electrostatic instruments are used as

Both ammeter and voltmeter

Voltmeters only

Wattmeter only

Ammeters only

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The dynamometer principle can be used for

wattmeter only.

ammeter only.

ammeter, voltmeter and wattmeter.

voltmeter only.

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A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of

Resistance of connecting leads.

Thermoelectric emfs.

Contact resistance.

All of above.

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An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

4%

6%

5%

3%

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The scale of a rectifier instrument is

None of the listed here

Linear

Non-linear

Either linear or non linear

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A ______ device prevents the oscillation of the moving statem and enables the latter to reach its final position quickly

Damping

None of the listed here

Deflecting

Controlling

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A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

First adjust R2 and then adjust R3.

First adjust R4 and then adjust R2.

First adjust R2 and then adjust R4.

First adjust R4 and then adjust R1.

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