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Magnetics question

2020 · 8 Jan · Shift 2 · Q45
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Magnetics question

2020 · 8 Jan · Shift 2 · Q45

JEE MainPhysicsMagneticsMCQ+4 / −1
A very long wire ABDMNDC is shown in figure carrying current I. AB and BC parts are straight, long and at right angle. At D wire forms a circular turn DMND of radius R. AB, BC parts are tangential to circular turn at N and D. Magnetic field at the centre of circle is : JEE Main 2020 (Online) 8th January Evening Slot Physics - Magnetic Effect of Current Question 152 English
  1. A
    μ0I2πR(π+1){{{\mu _0}I} \over {2\pi R}}\left( {\pi + 1} \right)2πRμ0​I​(π+1)
  2. B
    μ0I2πR(π−12){{{\mu _0}I} \over {2\pi R}}\left( {\pi - {1 \over {\sqrt 2 }}} \right)2πRμ0​I​(π−2​1​)
  3. C
    μ0I2R{{{\mu _0}I} \over {2R}}2Rμ0​I​
  4. D
    μ0I2πR(π+12){{{\mu _0}I} \over {2\pi R}}\left( {\pi + {1 \over {\sqrt 2 }}} \right)2πRμ0​I​(π+2​1​)
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