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Measurement and Instrumentation

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

 Newton
 Watt
 Joule/sec
 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) ?

 0.9µF
 1.5µF
 3.9µF
 2.4µF

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?

1 Ohm
2 Ohms
49.99 Ohms
1/49.99 ohms

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Measurement and Instrumentation
An oscilloscope indicates

Peak to peak value of voltage
Average value
RMS value
DC value of voltage

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Measurement and Instrumentation
A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read

 - 795 W.
 + 795 W.
  - 597 W.
 + 597 W.

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Measurement and Instrumentation
______ instruments are most sensitive.

Hot wire
Moving iron
Permanent magnet moving coil
Dynamometer

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