In order that current should flow without causing excessive heating or voltage drop, the relay contacts should_________________?
Correct answer: D. have all above properties
- A. have low contact resistance
- B. be clean and smooth
- C. be of sufficient size and proper shape
- D. have all above properties
Explanation
Relay contacts should have low resistance, clean and smooth surfaces, and adequate size and shape to carry current without excessive heating or voltage drop. Therefore, all the stated properties are required.
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