A)
B)
C)
D)
Correct Answer: A
Solution :
When \[x<r\] By Ampear's circuital law \[B\,.2\pi x={{\mu }_{0.}}\left[ \frac{i}{\pi {{r}^{2}}}\pi {{x}^{2}} \right]\] \[B=\frac{{{\mu }_{0}}ix}{2\pi {{r}^{2}}}\] B - x relation is straight line. for x > r By Ampear's law \[B.2\pi x={{\mu }_{0}}i\] \[B=\frac{{{\mu }_{0}}i}{2\pi r}\] B- x relation will be rectangular hyperbola. A
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