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Question: Answered & Verified by Expert
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 $\mathrm{P}$ due to the cubic network
PhysicsMagnetic Effects of CurrentBITSATBITSAT 2011
Options:
  • A $\frac{\mu_{0}}{4 \pi} \frac{2 I}{d}$
  • B $\frac{\mu_{0}}{4 \pi} \frac{2 \mathrm{I}}{\sqrt{2} \mathrm{~d}}$
  • C 0
  • D $\frac{\mu_{0}}{4 \pi} \frac{\theta \pi \mathrm{I}}{\mathrm{d}}$
Solution:
2268 Upvotes Verified Answer
The correct answer is: 0
Bysymmetry, the magnetic field at the centre Pis zero.

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