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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 6
36.
To avoid the effect of stray magnetic fields in ac bridge we can use
magnetic screening
Wagner earthing device
wave filter
transformer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
A resistance strain gauge is usually
wire grid type
foil type
any of these
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
If n measurements of a quantity are made, the arithmetic mean is
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.

Assertion (A): Secondary instruments require calibration at frequent intervals.

Reason (R): Secondary instruments have many errors.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
In ac bridge measurements, 'Wagner ground' means
a special RC connection to eliminate stray magnetic effects
a special RC connection to eliminate stray capacitance effects
an unwanted and unintended ground connection
a large metal plate buried in ground connected to one corner of bridge
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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