Exercise: Measurements And Instrumentation

Questions for: Measurements And Instrumentation

Assertion (A): A transducer needs an output measuring or display device for measuring a non electrical quantity.

Reason (R): In some transducers the output voltage is too small and needs amplification before it can be measured.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true R is false
D:
A is false R is true
Answer: B
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Assertion (A): A ballistic galvanometer is used to measure charge.

Reason (R): In a flux meter, the damping is large.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true R is false
D:
A is false R is true
Answer: B
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A hot wire instrument is not affected by stray magnetic fields.
A:
True
B:
False
C:
D:
Answer: A
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A megger has a hand driven dc generator.
A:
True
B:
False
C:
D:
Answer: A
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Which of the following draws minimum power from source?
A:
PMMC
B:
Electronic voltmeter
C:
Electrostatic voltmeter
D:
Moving iron voltmeter
Answer: B
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