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Measurement and Instrumentation

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.

 5
 1
 2
 4

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Measurement and Instrumentation
Which wave has the least form factor?

Sine wave
Rectangular wave
Square wave
Triangular wave

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Measurement and Instrumentation
A mulliammeter can be used as

Voltmeter and ammeter
Wattmeter
Frequency meter
Ohmmeter

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Measurement and Instrumentation
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is

 2%
 4%
 1%
 3%

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Measurement and Instrumentation
Resolution of an instrument is

 the maximum non linearity.
 the maximum quantity it can measure.
 the minimum quantity it can measure.
 ability to distinguish polarity.

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Measurement and Instrumentation
In the bridge given in the figure, the reading of the high impedance voltmeter is

 - 3.33 V.
 6.66 V.
 4.20 V.
 Zero.

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