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Measurement and Instrumentation

Measurement and Instrumentation
An electrodynamic meter can be used to measure

 DC voltage.
 DC current.
 AC volatge.
  both AC and DC voltage.

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Measurement and Instrumentation
The moving coil-meters, damping is provided by

 the aluminium frame of the coil.
 the coil spring attached to the moving.
 eddy current disk.
 damping vane in the airtight chamber.

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Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 240 Ohm.
 120 Ohm.
 0.0012 Ohm.
 0.0024 Ohm.

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Measurement and Instrumentation
Which one of the following meters has maximum loading effect on the circuit under measurement ?

 1000 Ω/volt
 100 Ω/volt
 10 MΩ/volt
 1 MΩ/volt

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Measurement and Instrumentation
An ammeter is ______ instrument.

None of the listed here
A recording
An integrating
An indicating

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Measurement and Instrumentation
Which of following is a vector quantity?

 Magnetic field intensity.
 Magnetic potential.
 Flux density.
 Relative permeability.

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