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A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?
- a)Mmf for iron and air gap are equal
- b)Mmf for iron is much less than that for air gap
- c)Mmf for iron is much more than that for air gap
- d)Mmf for iron and air gap are not equal
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A magnetic circuit has an iron length of 100 cm and air gap length 10 ...
We know that, MMF for air
Where B is the magnetic field intensity.
Where B is the magnetic field intensity.
Most Upvoted Answer
A magnetic circuit has an iron length of 100 cm and air gap length 10 ...
Understanding Magnetic Circuits
In a magnetic circuit, the magnetomotive force (MMF) is a crucial concept that helps us understand how magnetic fields interact in different materials.
Components of the Magnetic Circuit
- Iron Length: 100 cm
- Air Gap Length: 10 cm
- Relative Permeability (μr): 200 for iron
Magnetomotive Force (MMF)
MMF is given by the formula: MMF = H * l, where H is the magnetic field strength and l is the length of the magnetic path.
Comparing MMF in Iron and Air Gap
- Iron:
- High relative permeability (μr = 200) means that it can support a significant magnetic flux with a relatively low magnetic field strength (H).
- Hence, even with a longer length (100 cm), the MMF developed in iron will be substantial due to its high permeability.
- Air Gap:
- Air has a much lower permeability (μr ≈ 1), which means it requires a higher magnetic field strength (H) to achieve the same magnetic flux.
- Therefore, for the shorter length (10 cm), the MMF for the air gap will be considerably higher than that of the iron.
Conclusion: Why Option A is Correct
- Equal MMF: The MMF for both iron and the air gap must balance out in a magnetic circuit.
- Equal MMF Condition: Despite different permeabilities and lengths, the total MMF must be the same across different segments, thus making option 'A' correct: "MMF for iron and air gap are equal."
In summary, even though the material properties differ, the requirement for a closed magnetic circuit ensures that the MMF remains equal for both segments.
In a magnetic circuit, the magnetomotive force (MMF) is a crucial concept that helps us understand how magnetic fields interact in different materials.
Components of the Magnetic Circuit
- Iron Length: 100 cm
- Air Gap Length: 10 cm
- Relative Permeability (μr): 200 for iron
Magnetomotive Force (MMF)
MMF is given by the formula: MMF = H * l, where H is the magnetic field strength and l is the length of the magnetic path.
Comparing MMF in Iron and Air Gap
- Iron:
- High relative permeability (μr = 200) means that it can support a significant magnetic flux with a relatively low magnetic field strength (H).
- Hence, even with a longer length (100 cm), the MMF developed in iron will be substantial due to its high permeability.
- Air Gap:
- Air has a much lower permeability (μr ≈ 1), which means it requires a higher magnetic field strength (H) to achieve the same magnetic flux.
- Therefore, for the shorter length (10 cm), the MMF for the air gap will be considerably higher than that of the iron.
Conclusion: Why Option A is Correct
- Equal MMF: The MMF for both iron and the air gap must balance out in a magnetic circuit.
- Equal MMF Condition: Despite different permeabilities and lengths, the total MMF must be the same across different segments, thus making option 'A' correct: "MMF for iron and air gap are equal."
In summary, even though the material properties differ, the requirement for a closed magnetic circuit ensures that the MMF remains equal for both segments.
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Community Answer
A magnetic circuit has an iron length of 100 cm and air gap length 10 ...
We know that, MMF for air
Where B is the magnetic field intensity.
Where B is the magnetic field intensity.
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Question Description
A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer?.
A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?a)Mmf for iron and air gap are equalb)Mmf for iron is much less than that for air gapc)Mmf for iron is much more than that for air gapd)Mmf for iron and air gap are not equalCorrect answer is option 'A'. Can you explain this answer?.
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