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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following cannot be measured by multimeters?

Frequency
Current
Resistance
Voltage

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Measurement and Instrumentation
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

 114.6 μH/radian.
 12.0 μH/radian.
 4.8 μH/radian.
 2.0 μH/radian.

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Measurement and Instrumentation
Standardization of potentiometer is done in order that, they become

 precise.
 accurate.
 accurate and precise.
 accurate and direct reading.

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Measurement and Instrumentation
The errors introduced by an instrument fall in which category ?

 Random errors
 Environmental errors
 Gross errors
 Systematic errors

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Measurement and Instrumentation
The error of an instrument is normally given as a percentage of

Measured value
Full-scale value
Mean value
Rms value

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Measurement and Instrumentation
A galvanometer with a full scale current of 10 mA has a resistance of 1000 Ω. The multiplying power (the ratio of measured current to galvanometer current) of 100 Ω shunt with this galvanometer is

 11.
 10.
 110.
 100.

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