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Measurement and Instrumentation

Measurement and Instrumentation
A voltage of 2.70 V is being measured by an analog indicating instrument having a scale range of 0 – 5.0 V. If the instrument reads 2.65 V, then absolute error in measurement is

 0.01V
 0.05V
 0.01V
 0.25V

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

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

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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

 1.34 V.
 1.7 V.
 1.5 V.
 1 V.

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Measurement and Instrumentation
A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of

 Resistance of connecting leads.
 All of above.
 Contact resistance.
 Thermoelectric emfs.

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Measurement and Instrumentation
If two 300V full scale voltmeters V1 and V2 having sensitivities of 100 kOhm/V and 150 kOhm/V are connected in series to measure 500V then

 V1 = 0V and V2 = 0V.
 V1 = 300V and V2 = 200V.
 V1 = 250V and V2 = 250V.
 V1 = 200V and V2 = 300V.

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Measurement and Instrumentation
PMMC type instruments normally use

None of these
Fluid friction damping
Air friction damping
Eddy current damping

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