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Measurement and Instrumentation

Measurement and Instrumentation
Systematic errors are

 environmental errors.
All of these
 instrument errors.
 observational errors.

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Measurement and Instrumentation
A resistor of 10kΩhms with 5% tolerance is connected in parallel with a 5kΩhms resistor of 10% tolerance. What is the tolerance limit for the parallel network?

6.67%
5%
8.33%
10%

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Measurement and Instrumentation
An induction wattmeter can be used for

Dc only
Ac only
Both DC and AC
Any of the listed here

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Measurement and Instrumentation
A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be

 50 W.
  0 W.
 25 W.
 100 W.

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Measurement and Instrumentation
For measuring a very high resistance we should use

None of the listed here
Wheat stone bridge
Megger
Kelvin's double bridge

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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

 2%
 4%
 1%
 3%

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