Three students represent the variation of magnetic field B with distan

1.	Three students represent the variation of magnetic field B with distance r for a straight infinity long current carrying conductor asWhich of the three students has drawn the graph correctly and why?
Answer» For a straight infinitely long current carrying conductor, the magnetic field is given by the relation \(\underset{B}\rightarrow \) _{= \(\cfrac{μ_0I}{2\pi r}\)} Thus, B ∝ \(\cfrac{1}{r}\)and the graph between B and r will be a rectangular hyperbola. Thus, student 2 has drawn the graph correctly.

Three students represent the variation of magnetic field B with distance r for a straight infinity long current carrying conductor asWhich of the three students has drawn the graph correctly and why?

Answer»

For a straight infinitely long current carrying conductor, the magnetic field is given by the relation

\(\underset{B}\rightarrow \) _{= \(\cfrac{μ_0I}{2\pi r}\)}

Thus, B ∝ \(\cfrac{1}{r}\)and the graph between B and r will be a rectangular hyperbola. Thus, student 2 has drawn the graph correctly.