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Measurement and Instrumentation

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

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

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Measurement and Instrumentation
Induction wattmeter can measure

Dc power only
Both AC and DC
None of the listed here
Ac power only

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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

 252 V.
 248 V.
 260 V.
 250 V.

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Measurement and Instrumentation
The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A.

 2
 1
 4
 5

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Measurement and Instrumentation
Which of the quantity consists of unit as newton-second?

 velocity
 Speed
 Impulse
 Acceleration

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Measurement and Instrumentation
Which of following voltmeters would you use for measuring voltage across 20KΩ resistance

 None of above.
  Voltmeter having sensitivity of 10 KW/V.
 Voltmeter having sensitivity of 1 KW/V.
 Voltmeter having a resistance of 5 ΩK.

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