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Electronics and Communication Engineering - Electronic Devices and Circuits

Exercise : Electronic Devices and Circuits - Section 10
41.
Crompton potentiometer has
14 coils and a slide wire all having the same resistance
14 coils and a slide wire but the resistance of slide wire is half that of each coil
14 coils each of different resistance
14 coils out of which 7 coils have resistance which is twice that of remaining 7 coils
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.

Assertion (A): For best results the system of a D'Arsonval galvanometer should be slightly under damped.

Reason (R): Degree of damping affects the time taken by the instrument to come to final position.

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.
43.

Assertion (A): An RTD uses platinum coil.

Reason (R): Platinum is a very stable material.

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.
44.
Which of the following, is not a piezoelectric material?
Rochelle salt
Quartz
Lithium sulphate
Sodium bicarbonate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Harmonic distortion analyser
measures amplitude of each harmonic
measures rms value of fundamental frequency component
measures rms value of all harmonics except fundamental frequency
displays rms value of each harmonic on screen of CRO
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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