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Measurement and Instrumentation

Measurement and Instrumentation
For measurement of high direct voltage, one would use _____ voltmeter.

Hot wire
PMMC
Electrostatic
Moving iron

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Measurement and Instrumentation
A spring controlled indicating instrument has a deflection of 90deg for maximum current I. The corresponding deflection for a gravity controlled instrument is

0°
120°
30°
90°

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Measurement and Instrumentation
When testing a coil having a resistance of 10 ohms, resonance occurred when the oscillator frequency was 10 MHz and rotating capacitor was set at 500/2π pF. The effective value of the Q of the coil is

 25.4.
 20.
 54.2.
 31.4.

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Measurement and Instrumentation
Commonly used standard capacitor is

Electrostatic type
Multiplate parallel plate type
Spherical type
Concentric cylindrical type

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Measurement and Instrumentation
Which one of the following units is a fundamental unit?

 Joule/sec
 Watt
 Newton
 Ampere

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Measurement and Instrumentation
Two capacitance, C1 = 150 ± 2.4µF and C2 = 120 ± 1.5 µF are connected in parallel. What is the limiting error of the resultant capacitance C (in µF) ?

 2.4µF
 1.5µF
 0.9µF
 3.9µF

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