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Measurement and Instrumentation
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
5 V.
4.38 V.
4.54 V.
3.53 V.
5 V.
4.38 V.
4.54 V.
3.53 V.
Answer
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Related Question
Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is
1 µNm.
100 µNm.
200 µNm.
2 µNm.
1 µNm.
100 µNm.
200 µNm.
2 µNm.
Answer
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Measurement and Instrumentation
A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 V it is standardised by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wires is 1000 ohm, then the value of the working current will be
0.5 mA.
100 mA.
10 mA.
1mA.
0.5 mA.
100 mA.
10 mA.
1mA.
Answer
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Measurement and Instrumentation
Commonly used standard capacitor is
Concentric cylindrical type
Multiplate parallel plate type
Spherical type
Electrostatic type
Concentric cylindrical type
Multiplate parallel plate type
Spherical type
Electrostatic type
Answer
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Measurement and Instrumentation
To measure ac as well as dc power, we use
None of the listed here
Sometimes induction and sometimes dynamometer wattmeter
Dynamometer wattmeter
Induction wattmeter
None of the listed here
Sometimes induction and sometimes dynamometer wattmeter
Dynamometer wattmeter
Induction wattmeter
Answer
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Measurement and Instrumentation
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are
parallel.
perpendicular.
inclined at 30o.
inclined at 60o.
parallel.
perpendicular.
inclined at 30o.
inclined at 60o.
Answer
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