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Measurement and Instrumentation

Measurement and Instrumentation
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

100Hz
50Hz
500Hz
1kHz

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Measurement and Instrumentation
The pointer of an indicating instrument is generally made of _______

Copper
Soft steel
Silver
Aluminium

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Measurement and Instrumentation
The disc of an instrument using eddy current damping should be of

Non conducting and magnetic material
Conducting and non magnetic material
None of the listed here
Conducting and magnetic material

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Measurement and Instrumentation
The current ‘I’ through a resistance R is measures with the following uncertainties I = 4 A ± 0.5%, R = 100Ω±0.2%. If power is computed from these two measured quantities, the uncertainty in the power computed will be

 1.5%
 0.5%
 1.2%
 1%

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Measurement and Instrumentation
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

Almost zero
None of the listed here
Low
High

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Measurement and Instrumentation
The pressure coil of a wattmeter should be connected on the supply side of the current coil when

None of these
Load impedance is high
Supply voltage is low
Load impedance is low

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