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Measurement and Instrumentation

Measurement and Instrumentation
Which one of the following meters has maximum loading effect on the circuit under measurement ?

 1 MΩ/volt
 10 MΩ/volt
 1000 Ω/volt
 100 Ω/volt

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

99.99 K ohms
100 ohms
99.99 ohms
100 K ohms

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Measurement and Instrumentation
Which of the following essential featuresis possessed by an indicating instrument?

Deflecting device
All of the listed here
Damping device
Controlling device

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Measurement and Instrumentation
When the pointer of an indicating instrument comes to rest in the final deflected position, ______

Only deflecting torque acts
None of the listed here
Only controlling torque acts
Both deflecting and controlling torques act

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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

 110.
 100.
 10.
 11.

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Measurement and Instrumentation
A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

 ± 0.065
 ± 0.045
 ± 0.054
 ± 0.056

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