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BITSAT2011PhysicsMagnetic Effects of CurrentActual

A steady current is set up in a cubic network composed of wires of equal resistance and length d as shown in figure. What is the magnetic field at the centre P due to the cubic network

Options

  1. A₀ 4 2 I d
  2. B₀ 4 2 I 2 ~d
  3. C0
  4. D₀ 4 I d

Correct answer

C. 0

Step-by-step solution

Bysymmetry, the magnetic field at the centre Pis zero.

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