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Magnetics question

2020 · 2 Sep · Shift 2 · Q51
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Magnetics question

2020 · 2 Sep · Shift 2 · Q51

JEE MainPhysicsMagneticsMCQ+4 / −1
A wire carrying current I is bent in the shape ABCDEFA as shown, where rectangle ABCDA and ADEFA are perpendicular to each other. If the sides of the rectangles are of lengths a and b, then the magnitude and direction of magnetic moment of the loop ABCDEFA is JEE Main 2020 (Online) 2nd September Evening Slot Physics - Magnetic Effect of Current Question 144 English
  1. A
    2\sqrt 22​ abI, along (j^5+2k^5)\left( {{{\widehat j} \over {\sqrt 5 }} + {{2\widehat k} \over {\sqrt 5 }}} \right)(5​j​​+5​2k​)
  2. B
    abI, along (j^5+2k^5)\left( {{{\widehat j} \over {\sqrt 5 }} + {{2\widehat k} \over {\sqrt 5 }}} \right)(5​j​​+5​2k​)
  3. C
    2\sqrt 22​ abI, along (j^2+k^2)\left( {{{\widehat j} \over {\sqrt 2 }} + {{\widehat k} \over {\sqrt 2 }}} \right)(2​j​​+2​k​)
  4. D
    abI, along (j^2+k^2)\left( {{{\widehat j} \over {\sqrt 2 }} + {{\widehat k} \over {\sqrt 2 }}} \right)(2​j​​+2​k​)
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