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Most Important Selected Qs for JEE AdvancedPhysicsMagnetic Effects of Current

Two very long current carrying wires A and B carrying current I ₀ (along zaxis) are placed at (- a , 0) and ( a , 0) as shown. Find the value of magnetic field at (0 , a)

Options

  1. A₀ l₀ 2 a
  2. B₀ I₀ 2 a
  3. C₀ l₀ 4 a
  4. D₀ l₀ 2 2 a

Correct answer

B. ₀ I₀ 2 a

Step-by-step solution

B= B_A^2+B_B^2 = 2 ₀ I₀ 2 a 2 = ₀ I₀ 2 a

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