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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 8
21.
Two resistances are R1 = 36 ± 5% and R2 = 75 ± 5%. If they are connected in parallel, the limiting error in percent will be
5%
10%
15%
20%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
For critical damping, the resistance in D'Arsonval galvanometer circuit should be equal to
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
An ac bridge uses galvanometer as detector.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In figure, the reading of wattmeter will be proportional
V I cos θ
3 VI cos θ
3 VI sin θ
V I sin θ
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Consider the following statements about mutual inductances:
  1. The value should remain constant under all conditions.
  2. The mutual inductance should not vary with temperature.
  3. The inductance should be independent of excitation.
  4. They have two coils wound on a bobbin of hard magnetic material, coils being separated by a range.
Out of the above, correct statement are
2, 3, 4
1, 2, 3
1, 3, 4
1, 2, 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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