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Moving Charges and Magnetism question

2023 · Q170
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Moving Charges and Magnetism question

2023 · Q170

NEETPhysicsMoving Charges and MagnetismMCQ+4 / −1

A very long conducting wire is bent in a semi-circular shape from AAA to BBB as shown in figure. The magnetic field at point PPP for steady current configuration is given by :

NEET 2023 Physics - Moving Charges and Magnetism Question 9 English

  1. A
    μ0i4R\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}4Rμ0​i​ pointed away from the page
  2. B
    μ0i4R[1−2π]\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]4Rμ0​i​[1−π2​] pointed away from page
  3. C
    μ0i4R[1−2π]\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]4Rμ0​i​[1−π2​] pointed into the page
  4. D
    μ0i4R\frac{\mu_{0} \mathrm{i}}{4 \mathrm{R}}4Rμ0​i​ pointed into the page
View written solutionFree

Correct answer: B

$$\mathrm{B=\frac{\mu_{0}}{4 \pi} \frac{I}{R}(\pi)-\frac{\mu_{0}}{4 \pi} \frac{2 I}{R}}$$

$$=\frac{\mu_{0} \mathrm{I}}{4 \mathrm{R}}\left[1-\frac{2}{\pi}\right]$$ outward i.e. away from page.

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