A)
B)
C)
D)
Correct Answer: A
Solution :
The magnetic field at a point outside-the straight conductor is given by \[B=\frac{{{\mu }_{0}}i}{2\pi r}\] It means \[B\propto \frac{1}{r}\,\,\,\,(if\,\,r>a)\] The magnetic field at a point inside the conductor is \[B=\frac{{{\mu }_{0}}i\times r}{2\pi {{a}^{2}}}\] or \[\operatorname{B}\,\,\propto \,\,r\,\,\,\,\,(if\,\,r\,\,<\,\,a)\]You need to login to perform this action.
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