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Magnetics question

2021 · 17 Mar · Shift 2 · Q47
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Magnetics question

2021 · 17 Mar · Shift 2 · Q47

JEE MainPhysicsMagneticsMCQ+4 / −1
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? JEE Main 2021 (Online) 17th March Evening Shift Physics - Magnetic Effect of Current Question 129 English
  1. A
    μ0I4πr(2−π){{{\mu _0}I} \over {4\pi r}}(2 - \pi )4πrμ0​I​(2−π)
  2. B
    μ0I2πr(2−π){{{\mu _0}I} \over {2\pi r}}(2 - \pi )2πrμ0​I​(2−π)
  3. C
    μ0I4πr(2+π){{{\mu _0}I} \over {4\pi r}}(2 + \pi )4πrμ0​I​(2+π)
  4. D
    μ0I2πr(2+π){{{\mu _0}I} \over {2\pi r}}(2 + \pi )2πrμ0​I​(2+π)
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