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NEET2023PhysicsMagnetic Effects of CurrentActual

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:

Options

  1. Aμ 0 i 4 R 1 - 2 π pointed into the page
  2. Bμ 0 i 4 R pointed into the page
  3. Cμ 0 i 4 R pointed away from the page
  4. Dμ 0 i 4 R 1 - 2 π pointed away from the page

Correct answer

D. μ 0 i 4 R 1 - 2 π pointed away from the page

Step-by-step solution

Let's consider the following diagram: The formula to calculate the magnetic field B → 1 due to wire 1 is given by B → 1 = μ 0 i 4 π R ⊗       . . . 1 The formula to calculate the magnetic field B → 2 due to wire 2 is given by B → 2 = μ 0 i 4 R ⊙       . . . 2 And, the formula to calculate the magnetic field B → 3 due to wire 3 is given by B → 3 = μ 0 i 4 π R ⊗       . . . 3 Hence, the net

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