JEE AdvancedMagnetic field due to currentHard
Question
A non planer loop of conduction wire carrying a current along I is placed as shown in the figure. Each of the staright sections of the loop is length 2a. The magnetic field due to this loop at the point P(a, 0, a) point in direction
Options
A.
B.
C.
D.
Solution
he magnetic field at P(a, 0, a) due to the loop is equal to the vector sum of the magnetic fields produced by loops ABCDA and AFEBA as shown in the figure.
Magnetic field due to loop ABCDA will be along
and due to loop AFEBA, along 
. Magnetic field due to both the loops will be equal. Therefore, direction of resultant magnetic field at P will be 
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