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A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubted, the flux density in the core ____.
  • a)
    is double of the previous value
  • b)
    is half of the previous value
  • c)
    is same as the previous value
  • d)
    is not possible to predict
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A coil wound over an iron carries certain current and establishes flu...
Hence, the correct option is (B)
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A coil wound over an iron carries certain current and establishes flu...
Explanation:

When a coil is wound over an iron core, it generates a magnetic field or flux. The flux density in the core is directly proportional to the current flowing through the coil and the number of turns in the coil.

Flux Density (B) = Flux (Φ) / Area (A)

If the area of the cross-section of the iron core is doubled, it means that the denominator of the equation doubles. Since the flux (Φ) remains the same (as it depends on the number of turns and current), the flux density (B) will decrease.

Flux Density (B2) = Flux (Φ) / (2A)

Comparing the two equations, we can see that the new flux density (B2) is half of the previous flux density (B). Therefore, the correct answer is option 'B' - the flux density in the core is half of the previous value.

Summary:

When the area of the cross-section of an iron core is doubled, the flux density in the core is halved. This relationship is due to the inverse proportionality between flux density and cross-sectional area.
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A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubted, the flux density in the core ____.a)is double of the previous valueb)is half of the previous valuec)is same as the previous valued)is not possible to predictCorrect answer is option 'B'. Can you explain this answer?
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A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubted, the flux density in the core ____.a)is double of the previous valueb)is half of the previous valuec)is same as the previous valued)is not possible to predictCorrect answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubted, the flux density in the core ____.a)is double of the previous valueb)is half of the previous valuec)is same as the previous valued)is not possible to predictCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A coil wound over an iron carries certain current and establishes flux in the ring. If the area of a x-section of the ring is doubted, the flux density in the core ____.a)is double of the previous valueb)is half of the previous valuec)is same as the previous valued)is not possible to predictCorrect answer is option 'B'. Can you explain this answer?.
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