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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 9
46.
In a CRO the Y plates are oriented
horizontally
vertically
at an angle of 20° of horizontal
at an angle of 70° of horizontal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The accuracy of an instrument is determined by
closeness of indicated value to the actual value
repeatability of measured value
speed with which the reading approaches final value
least value which can be measured
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
If σ standard deviation, probable error
σ
± 1.19 σ
± 0.6745 σ
± 0.4125 σ
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.

Assertion (A): In two wattmeter method of 3 phase power measurement, one of the wattmeters would read negative if power factor of load is less than 0.5.

Reason (R): In two wattmeter method of 3 phase power measurement, both the wattmeters would show equal readings if power factor of load is unity.

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.
50.
In a megger the moving coil meter has a permanent magnet.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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