The resistance wire used in a hot wire anemometer for conducting electrical current is made of__________________?
Correct answer: A. Tungsten
- A. Tungsten
- B. Copper
- C. Chromium
- D. Aluminium
Explanation
Tungsten is used for the heated resistance wire because it tolerates high temperature and has a useful temperature-dependent electrical resistance. Copper and aluminium have much lower temperature capability for this service.
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