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JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
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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 163 English
A
$$\sqrt 2 $$abI, along $$\left( {{{\widehat j} \over {\sqrt 5 }} + {{2\widehat k} \over {\sqrt 5 }}} \right)$$
B
abI, along $$\left( {{{\widehat j} \over {\sqrt 5 }} + {{2\widehat k} \over {\sqrt 5 }}} \right)$$
C
$$\sqrt 2 $$abI, along $$\left( {{{\widehat j} \over {\sqrt 2 }} + {{\widehat k} \over {\sqrt 2 }}} \right)$$
D
abI, along $$\left( {{{\widehat j} \over {\sqrt 2 }} + {{\widehat k} \over {\sqrt 2 }}} \right)$$

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