Induction cup relay is operated due to changes in________________?
Correct answer: D. all of the above
- A. current
- B. voltage
- C. impedance
- D. all of the above
Explanation
An induction-cup relay develops torque from the interaction of alternating magnetic fluxes, and its operation may be arranged to respond to current, voltage or impedance changes. Hence all three quantities can form the operating basis.
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