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Measurement and Instrumentation

Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Rb/Rc).Ra.
 (Rc/Rb).Ra.
 (Rc/Ra).Rb.
 (Ra/Rc).Rb.

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

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Measurement and Instrumentation
Dynamic errors are caused by

 human error
 observational error
 environmental error
 instrument not responding fast

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

 Random errors
 Gross errors
 Systematic errors
 Environmental errors

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Measurement and Instrumentation
The range of a moving iron ac ammeter is extended by

A shunt
A multiplier
None of the listed here
Changing number of turns of operating coil

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Measurement and Instrumentation
A CRO can display

Time invariant signals
Both AC and DC signals
AC signals
DC signals

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