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Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?
  • a)
    Welec = Wfld
  • b)
    Welec = Wmech
  • c)
    Welec = Wmech/2+Wfld/2
  • d)
    Welec = 0
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider a magnetic relay with linear magnetization curve in both of i...
Explanation:

Energy Conversion in a Magnetic Relay:
- In a magnetic relay, electrical energy is converted into magnetic field energy when the relay is energized.
- This magnetic field then acts on the armature, causing it to move and mechanically switch the relay contacts.

Energy Input during Armature Movement:
- When the armature moves slowly from the open position to the closed position, both mechanical and magnetic energy are involved in the process.
- The electrical energy input to the relay is divided between the mechanical work done in moving the armature and the magnetic field energy.

Calculation of Electrical Energy Input:
- The total electrical energy input (Welec) to the relay during this process can be divided into two parts: the mechanical work done (Wmech) and the magnetic field energy (Wfld).
- Since the armature moves slowly from the open to the closed position, the electrical energy input can be approximated as the average of the mechanical and magnetic energies: Welec = Wmech/2 + Wfld/2.

Conclusion:
- Therefore, the correct answer is option 'C', where the electrical energy input to the relay during the slow movement of the armature from open to closed position is divided equally between the mechanical work done and the magnetic field energy.
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Community Answer
Consider a magnetic relay with linear magnetization curve in both of i...
For the above mentioned case, Wfld = Wmech and Wfld = Welec/2 hence, option “c” is the correct answer.
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Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?a)Welec = Wfldb)Welec = Wmechc)Welec = Wmech/2+Wfld/2d)Welec = 0Correct answer is option 'C'. Can you explain this answer?
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Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?a)Welec = Wfldb)Welec = Wmechc)Welec = Wmech/2+Wfld/2d)Welec = 0Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?a)Welec = Wfldb)Welec = Wmechc)Welec = Wmech/2+Wfld/2d)Welec = 0Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider a magnetic relay with linear magnetization curve in both of its open and closed position. What happens to the electrical energy input to the relay, when the armature moves slowly from open position to closed position?a)Welec = Wfldb)Welec = Wmechc)Welec = Wmech/2+Wfld/2d)Welec = 0Correct answer is option 'C'. Can you explain this answer?.
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