Relays can be designed to respond to changes in________________?
Correct answer: E. all above
- A. resistance, reactance or impedance
- B. voltage and current
- C. light intensity
- D. temperature
- E. all above
Explanation
Protective relays can be made responsive to electrical quantities such as current, voltage, resistance, reactance, or impedance, and to non-electrical quantities such as light and temperature. Thus, all the listed responses are possible in relay applications.
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