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Measurement and Instrumentation

Measurement and Instrumentation
A 10MHz CRO has

10MHz vertical oscillator
10MHz horizontal oscillator
5MHz sweep
10MHz supply frequency

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Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 (2 + √3/2)V.
 5 V.
 0 V.
 2 V.

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Measurement and Instrumentation
The errors mainly caused by human mistakes are

  gross error.
 systematic error.
 observational error.
 instrumental error.

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Measurement and Instrumentation
The resistance offered to the passage of an in-varying current by a column of mercury at the temperature of melting ice of mass 14.4521 gms of uniform cross-sectional area and length 106.3cm is

One ohm according to working standards
Standard ohm
One international ohm
One ohm according to SI units

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Measurement and Instrumentation
One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land?

0.84
0.73
1
0.65

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Negative
Positive
Negligible
None of the listed here

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