All straight wires are very long. Both AB and CD are arcs of the same circle, both…

Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism

All straight wires are very long. Both AB and CD are arcs of the same circle, both subtending right angles at the centre O. Then the magnetic field at O is–

1. \(\frac{0^{\mathrm{i}}}{4 \pi R}\)
2. \(\frac{0^{\mathrm{i}}}{4 \pi \mathrm{R}} \sqrt{2}\)
3. \(\frac{0^{\mathrm{i}}}{2 \pi \mathrm{R}}\)
4. \(\frac{0^{\mathrm{i}}}{2 \pi \mathrm{R}}(\pi+1)\)

Answer

(C) 0^ i 2 R

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