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Measurement and Instrumentation

Measurement and Instrumentation
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage

 2 %.
  2.66 %.
 1 %.
 3.33 %.

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Measurement and Instrumentation
A moving iron instrument can be used for

None of the listed here
Both DC& AC
DC only
AC only

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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

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

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Measurement and Instrumentation
The meter constant of an energy meter is 1500 rev/kWh, the disc makes 3000 revolution in a given time. The energy consumed is

2 kWh
3 kWh
4 kWh
1 kWh

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Measurement and Instrumentation
A potentiometer may be used for

Measurement of current
Measurrment of resistance
Calibration of ammeter
All of the listed here

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Measurement and Instrumentation
A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read

 + 597 W.
 + 795 W.
 - 795 W.
  - 597 W.

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