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Measurement and Instrumentation

Measurement and Instrumentation
The internal resistance of an ammeter should be

Very small
High
Infinity
Medium

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured as I1 = 150 ± 1A , I2 = 250 ± 2A, where the limits of error are as standard deviations. I is measured as

 (400 ± 1.5) A
 (400 ± 1) A
 (400 ± 3) A
 (400 ± 2.24) A

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 a straight line.
  a circle.
 sinisoidal.
 an ellipse.

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Measurement and Instrumentation
A spring controlled indicating instrument has a deflection of 90deg for maximum current I. The corresponding deflection for a gravity controlled instrument is

90°
120°
30°
0°

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Measurement and Instrumentation
In a single phase energy meter, braking torque is provided by

Air friction
Permanent magnet
Fluid friction
None of the listed here

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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.
 very high.
 high.
 small.

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MORE MCQ ON Measurement and Instrumentation

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