Consider a thin long insulator coated conducting wire carrying current I. It is now wound once around an insulating thin disc of radius R to bring the wire back on the same side, as shown in the figure. The magnetic field at the centre of the disc is equal to: (A) Ho! (B) 쓰13 + Ho! 2R 4R (C) 1+ Ho! (D) |1 + Ho! 4R 2R
Consider a thin long insulator coated conducting wire carrying current I. It is now wound once around an insulating thin disc of radius R to bring the wire back on the same side, as shown in the figure. The magnetic field at the centre of the disc is equal to: (A) Ho! (B) 쓰13 + Ho! 2R 4R (C) 1+ Ho! (D) |1 + Ho! 4R 2R
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Transcribed Image Text:Q.24 Consider a thin long insulator coated conducting wire carrying current I. It is now wound once
around an insulating thin disc of radius R to bring the wire back on the same side, as shown in the
figure. The magnetic field at the centre of the disc is equal to:
Ho!
(B)第+引
(A)
2R
(C) 1+
Hol
(D) 1 +
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