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Measurement and Instrumentation

Measurement and Instrumentation
Dynamic errors are caused by

 human error
 observational error
 instrument not responding fast
 environmental error

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

 20√3.
 10.
  10√3.
 20.

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Measurement and Instrumentation
In a dynamometer wattmeter, the moving coil is the

Potential coil
Current coil and potential coil
None of the listed here
Current coil

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Measurement and Instrumentation
What is the name of physical quantities which are independent of each other?

 Fundamental quantity
 Derived quantity
 Numerical quantity
None of these

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.4% less.
 0.4 more.
 0.2% less.
 0.2% more.

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1.5 V.
 1.34 V.
 1.7 V.
 1 V.

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