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Electronics and Communication Engineering - Measurements and Instrumentation

Exercise : Measurements and Instrumentation - Section 7
31.
In a platinum RTD, the change in resistance for a temperature rise of 50° C is about
2%
10%
20%
40%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The gauge factor of a semiconductor strain gauge is about
2
10
100
1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Which of the following instruments is used almost exclusively to measure radio frequency currents?
Moving coil
Rectifier
Moving iron
Thermocouple
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
The coil of a DArsonval galvanometer has N turns. If flux density is B, current is I and area of coil is A, the deflecting torque is
NBI/A
NBIA
NIA/B
N2IAB
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Consider the following statements regarding electromagnetic flowmeter
  1. AC excitation is used to avoid polarisation of fluid.
  2. The meter calibration is changed as viscosity of fluid changes.
  3. Stainless steel pipes can be used for measuring the flow of liquid of high conductivity.
Of the above statements
1, 2, 3 are correct
1 and 2 are correct
2 and 3 are correct
1 and 3 are correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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