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Measurement and Instrumentation

Measurement and Instrumentation
An electric pyrometer is an instrument used to measure

Phase
High temperatures
None of the listed here
Frequency

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Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 2 µNm.
 1 µNm.
  200 µNm.
 100 µNm.

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Measurement and Instrumentation
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is

 114.6 μH/radian.
 12.0 μH/radian.
 2.0 μH/radian.
 4.8 μH/radian.

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Measurement and Instrumentation
Schering bridge is used to measure which of the following?

  Capacitance.
 Frequency.
 Resistance.
 Inductance.

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Measurement and Instrumentation
The form factor in AC is the ratio of

Peak value to rms value
Peak value to average value
Rms value to peak value
Rms value to average value

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Measurement and Instrumentation
The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

 250 V.
 252 V.
 248 V.
 260 V.

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