The electrical conductivity of a ______________ decreases with rise in temperature?
Correct answer: A. Metal/alloy
- A. Metal/alloy
- B. Semi-conductor
- C. Dielectric
- D. None of these
Explanation
Metals and alloys conduct mainly through free electrons, whose increased thermal motion at higher temperature increases scattering and lowers conductivity. Semiconductors usually show the opposite trend because more charge carriers become available.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Plant Design and Economics
803 free Plant Design and Economics MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Plant Design and Economics questions
Silicon percentage in iron castings to have maximum hardness should be about__________________?
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?
Which of the following has a very high carbide forming tendency in steels ?
18/8 stainless steel means, that it contains__________________?
High speed steel should have high___________________?
Anodic material used for the cathodic protection of underground buried steel pipeline is_________________?