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A horizontal overhead power line is at a height of 4m from the ground and carries a current of 100A from east to west. The magnetic field directly below it on the ground is (μ0 = 4π x 10−7 TmA−1)
  • a)
    2.5 x 10−7 T southward
  • b)
    5 x 10−6 T northward
  • c)
    5 x 10−6 T southward
  • d)
    2.5 x 10−7 T northward
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A horizontal overhead power line is at a height of 4m from the ground ...
The magnetic field directly below the overhead power line can be calculated using the formula for the magnetic field produced by a long straight wire:

B = (μ₀ * I) / (2π * r)

Where:
- B is the magnetic field
- μ₀ is the permeability of free space, approximately 4π x 10^(-7) T·m/A
- I is the current in the wire
- r is the distance from the wire

In this case, the current is 100A and the distance from the wire is 4m. Substituting these values into the formula:

B = (4π x 10^(-7) T·m/A * 100A) / (2π * 4m)

Simplifying:

B = 2π x 10^(-7) T

Therefore, the magnetic field directly below the overhead power line on the ground is approximately 2π x 10^(-7) T.
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A horizontal overhead power line is at a height of 4m from the ground ...
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A horizontal overhead power line is at a height of 4m from the ground and carries a current of 100A from east to west. The magnetic field directly below it on the ground is (μ0 = 4π x 10−7 TmA−1)a)2.5 x 10−7 T southwardb)5 x 10−6T northwardc)5 x 10−6T southwardd)2.5 x 10−7 T northwardCorrect answer is option 'C'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A horizontal overhead power line is at a height of 4m from the ground and carries a current of 100A from east to west. The magnetic field directly below it on the ground is (μ0 = 4π x 10−7 TmA−1)a)2.5 x 10−7 T southwardb)5 x 10−6T northwardc)5 x 10−6T southwardd)2.5 x 10−7 T northwardCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A horizontal overhead power line is at a height of 4m from the ground and carries a current of 100A from east to west. The magnetic field directly below it on the ground is (μ0 = 4π x 10−7 TmA−1)a)2.5 x 10−7 T southwardb)5 x 10−6T northwardc)5 x 10−6T southwardd)2.5 x 10−7 T northwardCorrect answer is option 'C'. Can you explain this answer?.
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