A hairpin like shape as shown in figure is made by bending a long current carrying wire. What is the magnitude of a magnetic field at point $P$ which lies on the centre of the semicircle ?

Question

A hairpin like shape as shown in figure is made by bending a long current carrying wire. What is the magnitude of a magnetic field at point P which lies on the centre of the semicircle ?

TestHub · Accepted Answer

B = 2 × B st . wire + B loop B = 2 × μ 0 i 4 π r + μ 0 i 2 r π 2 π B = μ 0 i 4 π r ( 2 + π )

Physics - Magnetism Question with Solution | TestHub

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