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Measurement and Instrumentation

Measurement and Instrumentation
A 0 - 200 V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 50 V. What is the limiting error?

 5%
 2%
 3%
 4%

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Measurement and Instrumentation
If the instrument is to have a wide range, the instrument should have

Logarithmic scale
Exponential scale
Linear scale
Square-law scale

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Measurement and Instrumentation
Which of following are needed both for protection and metering?

 Instrument transformer.
 Energy meter.
 Wattmeters.
 Power factor meters.

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Measurement and Instrumentation
Magnetic deflection is inversely proportional to

 Voltage.
 (Voltage)2.
 (Voltage)1.5.
 (Voltage)-0.5.

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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
 3.9µF
 1.5µF
 0.9µF

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Measurement and Instrumentation
It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor?

100W
50W
150W
200W

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