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Measurement and Instrumentation

Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

None of the listed here
Increases
Remains same
Decreases

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Measurement and Instrumentation
When testing a coil having a resistance of 10 ohms, resonance occurred when the oscillator frequency was 10 MHz and rotating capacitor was set at 500/2π pF. The effective value of the Q of the coil is

 31.4.
 25.4.
 54.2.
 20.

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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

 4%
 3%
 2%
 1%

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Measurement and Instrumentation
Induction wattmeter can measure

Dc power only
Ac power only
None of the listed here
Both AC and DC

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Measurement and Instrumentation
In a megger controlling torque is provided by

Gravity
Eddy current
Spring
Coil

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Measurement and Instrumentation
Resolution of an instrument is

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

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