A)
B)
C)
D)
Correct Answer: B
Solution :
[b] The magnetic field from the centre of wire of radius R is given by \[B=\left( \frac{{{\mu }_{0}}I}{2{{R}^{2}}} \right)r\] \[(r<R)\Rightarrow B\propto r\] and \[B=\frac{{{\mu }_{0}}I}{2\pi r}(r>R)\Rightarrow B\propto \frac{1}{r}\] From the above descriptions, we can say that the graph [b] is a correct representation.
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