MEASUREMENT AND INSTRUMENTATION QUIZ

Which of the two have same dimensions?

Force and stress

None of these

Angular velocity and angular frequency

Force and strain

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A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

3.53 V.

4.54 V.

4.38 V.

5 V.

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A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

114.6 μH/radian.

4.8 μH/radian.

12.0 μH/radian.

2.0 μH/radian.

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Piezoelectric effect is carried out in

crystal filter.

m derived.

constant k prototype.

composite filter.

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An induction wattmeter can be used for

Ac only

Any of the listed here

Dc only

Both DC and AC

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Which wave has the least form factor?

Sine wave

Triangular wave

Rectangular wave

Square wave

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For measurement of mutual inductance we can use

Anderson bridge

Any of the listed here

Maxwell's bridge

Heavyside bridge

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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 R4 and then adjust R1.

First adjust R2 and then adjust R4.

First adjust R2 and then adjust R3.

First adjust R4 and then adjust R2.

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The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

99.99 ohms

100 ohms

99.99 K ohms

100 K ohms

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Relative permittivity can be measured by _______ bridge

Schering.

Hays.

Wheatstones.

Desautys.

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