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Measurement and Instrumentation

Measurement and Instrumentation
The core flux in the CT of above question no.6, under the given operating conditions is

 225 mWb.
 0.
 1000 mWb.
 450 mWb.

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Measurement and Instrumentation
A PMMC instrument can be used as flux meter

By using a low resistance shunt
By making control springs of large moment of inertia
By eliminating the control springs
By using a high series resistance

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Measurement and Instrumentation
A spring-controlled moving iron voltmeter draws a current of 1 mA for full scale value of 100V. If it draws a current of 0.5 mA, the meter reading is

 200 V.
 50 V.
 100 V.
 25 V.

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Measurement and Instrumentation
The form factor in AC is the ratio of

Peak value to rms value
Rms value to peak value
Peak value to average value
Rms value to average value

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Measurement and Instrumentation
A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be

 ± 6%
 ± 8%
 ± 5%
 ± 7%

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Measurement and Instrumentation
The scale of hot wire ammeter is

 Cramped.
 Absloute linear.
 Linear.
  Non Linear.

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MORE MCQ ON Measurement and Instrumentation

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