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Measurement and Instrumentation

Measurement and Instrumentation
What is the approximate input impedance of a CRO?

 10 MΩ
 100 MΩ
 0
 1 MΩ

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Measurement and Instrumentation
An average reading digital multimeter reads 10 V when fed a triangular wave, symmetric about the axis. For the same input, an rms reading meter will read

 20.
 20√3.
  10√3.
 10.

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Measurement and Instrumentation
Commonly used standard capacitor is

Multiplate parallel plate type
Concentric cylindrical type
Spherical type
Electrostatic type

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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

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

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Measurement and Instrumentation
In figure Z1 = 200∠60° ohm. Z2 = 400∠-90° ohm, Z3 = 300∠0° ohm. Then Z4 for bridge to be balanced is

 300∠90° ohm.
 150∠30° ohm.
 400∠-90° ohm.
 600∠-150° ohm.

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Measurement and Instrumentation
The core flux in the CT of above question no.6, under the given operating conditions is

 450 mWb.
 0.
 1000 mWb.
 225 mWb.

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MORE MCQ ON Measurement and Instrumentation

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