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Measurement and Instrumentation
Measurement and Instrumentation
Assertion (A) : It is always desirable to take the reading of an indicating instrument very close to the full scale reading. Reason (R) : Accuracy of an indicating instrument is maximum at the full scale deflection and error increases as reading comes closer to the beginning of the scale.
A is true but R is false
Both A and R are true but R is NOT the correct explanation of A
A is false bur R is true
Both A and R are true and R is the correct explanation of A
A is true but R is false
Both A and R are true but R is NOT the correct explanation of A
A is false bur R is true
Both A and R are true and R is the correct explanation of A
Answer
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Measurement and Instrumentation
A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be
± 7%
± 8%
± 5%
± 6%
± 7%
± 8%
± 5%
± 6%
Answer
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Measurement and Instrumentation
Which one of the following meters has maximum loading effect on the circuit under measurement ?
1000 Ω/volt
100 Ω/volt
1 MΩ/volt
10 MΩ/volt
1000 Ω/volt
100 Ω/volt
1 MΩ/volt
10 MΩ/volt
Answer
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Measurement and Instrumentation
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is
3%
1%
4%
2%
3%
1%
4%
2%
Answer
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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?
2%
3%
4%
5%
2%
3%
4%
5%
Answer
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