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Measurement and Instrumentation

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

 1 MΩ
 100 MΩ
 10 MΩ
 0

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Measurement and Instrumentation
A dynamometer wattmeter can be used for

Any of the listed here
AC only
DC only
Both DC and AC

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Measurement and Instrumentation
In the bridge given in the figure, the reading of the high impedance voltmeter is

 4.20 V.
 - 3.33 V.
 6.66 V.
 Zero.

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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 ± 2.24) A
 (400 ± 1) A
 (400 ± 3) A

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Measurement and Instrumentation
The internal resistance of a milli-ammeter must be very low for

 minimum effect on the current in the circuit.
 high sensitivity.
 high precision.
 high accuracy.

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Measurement and Instrumentation
The function of shunt in an ammeter is to

Increase the resistance of ammeter
None of the listed here
Increase the sensitivity of the ammeter
By pass the current

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MORE MCQ ON Measurement and Instrumentation

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