For heating element high resistivity material is chosen to______________?
Correct answer: A. reduce the length of heating element
- A. reduce the length of heating element
- B. increase the life of the heating element
- C. reduce the effect of oxidation
- D. produce large amount of heat
Explanation
For a required resistance, R = ρL/A, so higher resistivity allows the element to achieve that resistance with a shorter length or larger cross-section. This makes the heating element more compact.
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