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Measurement and Instrumentation

Measurement and Instrumentation
In which of the transformer is the secondary nearly short circuited under normal operating condition?

 Power transformer.
 PT.
 Distribution transformer.
 CT.

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Measurement and Instrumentation
The maximum percentage error in the sum of two voltage measurements when V1 = 100V ± 1% and V2 = 80V ± 5% is

 ± 4%
 ± 6%
 ± 2.8%
 ± 3%

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Measurement and Instrumentation
Electrostatic instruments are used as

Ammeters only
Voltmeters only
Both ammeter and voltmeter
Wattmeter only

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Measurement and Instrumentation
The smallest change in measured variable to which instrument will respond is

 precision.
  resolution.
 accuracy.
 sensitivity.

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 an ellipse.
 sinisoidal.
  a circle.
 a straight line.

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Measurement and Instrumentation
Relative permittivity can be measured by _______ bridge

 Wheatstones.
 Desautys.
 Schering.
 Hays.

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