Exam

AIIMS

Year

2004

Subject

Physics

Chapter

Magnetic Effects of Current

AIIMS 2004 · Physics · Magnetic Effects of Current

The magnetic field due to a straight conductor of uniform...

The magnetic field due to a straight conductor of uniform cross-section of radius $a$ and carrying a steady current is represented by

Step-by-step solution

Magnetic field at a point outside the straight conductor is B=$\frac{\mu_0 I}{2 \pi r}$i.e. $B \propto(1 / r) \quad(r \gt a)$. Magnetic field at a point lying inside the conductor is B \propto r \quad(r < a) .