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Measurement and Instrumentation

Measurement and Instrumentation
A moving coil permanent magnet instrument can be used as ______ by using a low resistance shunt.

Ammeter
Voltmeter
Ballastic galvanometer
Flux meter

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Measurement and Instrumentation
In an Anderson bridge, the unknown inductance is measured in terms of

Known inductance
Known capacitance and resistance
Known inductance and resistance
Known resistance

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Measurement and Instrumentation
The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A.

 1
 2
 5
 4

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Measurement and Instrumentation
A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be

 100 W.
  0 W.
 25 W.
 50 W.

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Measurement and Instrumentation
Moving iron instruments have _____ scale.

Log
Uniform
None of the listed here
Squared

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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

 50 V.
 100 V.
 200 V.
 25 V.

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