Electronics and Communication Engineering - Measurements and Instrumentation - Discussion

Discussion Forum : Measurements and Instrumentation - Section 4 (Q.No. 14)
14.
A temperature sensistive transducer is subjected to sudden temperature change. It takes 10 seconds for transducer to reach equilibrium condition (five times time constant). The time taken to reach half of temperature difference will be
1.38 s
5 s
8.62 s
0.9 s
Answer: Option
Explanation:

The initial change is fast.

Discussion:
4 comments Page 1 of 1.

Ash said:   4 years ago
Thanks @Jazz.

Jazz said:   6 years ago
Use the formula for charging:

5 Time constant(T) = 10, therefore Time constant(T) = 2.
%Equilibrium = (1 - e^(-t/T)),
0.5 = (1 - e^(-t/2)).

And we get; t = 1.386 s.

Hetram said:   8 years ago
Please give the correct explanation.

Swamy said:   8 years ago
Please elaborate the answer.

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