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Magnetics question

2023 · 31 Jan · Shift 2 · Q56
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  5. /2023 · 31 Jan · Shift 2 · Q56

Magnetics question

2023 · 31 Jan · Shift 2 · Q56

JEE MainPhysicsMagneticsMCQ+4 / −1
A long conducting wire having a current I flowing through it, is bent into a circular coil of N\mathrm{N}N turns. Then it is bent into a circular coil of n\mathrm{n}n turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is :
  1. A
    N2:n2N^{2}: n^{2}N2:n2
  2. B
    N:n\mathrm{N}: \mathrm{n}N:n
  3. C
    n:N\mathrm{n}: \mathrm{N}n:N
  4. D
    n2:N2n^{2}: N^{2}n2:N2
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