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Measurement and Instrumentation

Measurement and Instrumentation
Which of the quantity consists of SI unit as Candela?

 Luminous intensity
 Impulse
 Force
 Velocity

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Measurement and Instrumentation
In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is

 2.5 mm/Ω
 0.8 mm/Ω
 5.0 mm/Ω
 0.4 mm/Ω

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Measurement and Instrumentation
Piezoelectronic accelerometer

 Has a low natural frequency.
 Should be used for low frequency.
 Should use a monitoring source at low input impedance.
 Should be used for high frequencies above 100 Hz.

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Measurement and Instrumentation
A megger is usually

Moving coil type instrument
Electro-static type instrument
Moving iron type instrument
Hot-wire type instrument

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Measurement and Instrumentation
When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is

 ideally zero.
 high.
 very high.
 small.

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Measurement and Instrumentation
In eddy current damping, disc or former is made of a material that is a

Non conductor but magnetic
Conductor but non magnetic
Non conductor and non magnetic
Conductor but magnetic

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