Verified Solution • 2025–26 Session moderate

QNEET-2023-Ph-244: NEET 2023 Physics - Class 12 NEET-2023-Ph-244 Solution: A very long conducting wire is bent in a semi-circular shape…

A very long conducting wire is bent in a semi-circular shape from A to B as shown in figure. The magnetic field at point P for steady current configuration is given by: μ0i4R\frac{\mu_0 i}{4R} pointed away from the page μ0i4R[1−2π]\frac{\mu_0 i}{4R}[1-\frac{2}{\pi}] pointed away from page μ0i4R[1−2π]\frac{\mu_0 i}{4R}[1-\frac{2}{\pi}] pointed into the page μ0i4R\frac{\mu_0 i}{4R} pointed into the page

Multiple Choice Options

  • A μ0i4R\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}} 4 R _ 0 _ i _ pointed away from the page
  • B μ0i4R[1−2π]\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right] 4 R _ 0 _ i _ [ 1 _ � 2 _ ] pointed away from page
  • C μ0i4R[1−2π]\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right] 4 R _ 0 _ i _ [ 1 _ � 2 _ ] pointed into the page
  • D μ0i4R\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}} 4 R _ 0 _ i _ pointed into the page

Step-by-Step Verified Solution

B = _ 0 4 � I R ( � ) _ _ 0 4 � 2 I R = _ 0 I 4 R [ 1 _ 2 � ] outward i.e. away from page.

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