Figure shows a square loop ABCD with edge length a . The resistance of the wire ABC is r…
Physics · JEE Advanced · NTA Exams — Magnetic Effects of Current and Magnetism
Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r and that of ADC is 2r. The value of magnetic field at the centre of the loop assuming uniform wire is
- \(\frac{\sqrt{2} \mu_{0} \mathrm{i}}{3 \pi \mathrm{a}}\)\(\text { o }\)
- \(\frac{\sqrt{2} \mu_{0} \mathrm{i}}{3 \pi \mathrm{a}} \otimes\)
- \(\frac{\sqrt{2} \mu_{0} \mathrm{i}}{\pi \mathrm{a}}\)\(\text { o }\)
- \(\frac{\sqrt{2} \mu_{0} \mathrm{i}}{\pi \mathrm{a}} \otimes\)
Answer
(B) 2 _ 0 i 3 a
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