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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following meter is most suitable for measuring radio frequency currents?

 Moving - coil meter.
 VTVM.
 Moving - iron meter.
  Thermocouple meter.

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Measurement and Instrumentation
An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is

 4%
 5%
 6%
 3%

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Measurement and Instrumentation
A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 V it is standardised by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wires is 1000 ohm, then the value of the working current will be

 0.5 mA.
 10 mA.
 100 mA.
 1mA.

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Measurement and Instrumentation
A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads

111V
90V
100V
50V

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Current
 Voltage
 Both Voltage and Temperature
 Temperature

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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.
 small.
 very high.

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MORE MCQ ON Measurement and Instrumentation

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