Platinum is used in_____________?
Correct answer: E. all of the above
- A. electrical contacts
- B. thermocouple
- C. heating element in high temperature furnace
- D. grids of special purpose vacuum tubes
- E. all of the above
Explanation
Platinum is used for durable contacts, high-temperature thermocouples, furnace heating elements, and specialized vacuum-tube grids because it resists oxidation and retains useful properties at high temperature. Thus all the listed applications are valid.
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