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  • An infinitely long straight conductor is bent into shape as shown in the figure below. It carries a current I ampere and the radius of the circular loop is r metre. Then the magnetic induction B at

An infinitely long straight conductor is bent into shape as shown in the figure below. It carries a current I ampere and the radius of the circular loop is r metre. Then the magnetic induction B at the centre of the circular part is:

Option: 1

zero


Option: 2

\infty


Option: 3

\mathrm{\frac{\mu_0}{4 \pi} \times \frac{2 l}{r}[\pi+1]}


Option: 4

\frac{\mu_0}{4 \pi} \times \frac{2 \mathrm{l}}{\mathrm{r}}[\pi-1]


Answers (1)

best_answer

due to wire, \frac{\mu_0 \mathrm{l}}{4 \pi} \frac{2}{\mathrm{r}} 

due to circle  \frac{\mu_0 \mathrm{I}}{4 \pi} \frac{2 \pi}{\mathrm{r}}  in opposite direction.

Posted by

jitender.kumar

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