What is the direction of vecor B at O due to the entire wire, ABCDE? An infinite

Question

What is the direction of vecor B at O due to the entire wire, ABCDE?

An infinitely long wire is bent as shown in the figure. The current is i. It consist of three segments, AB, BND, and DE. AB and DE are parallel and both infinite in length. BCD is a semi - circular arc, with radius OB = OC = OD = r. The following questions are concerned with the magnetic field vector, at O. What is the direction of at O due to the entire wire, ABCDE? In the positive y direction in the negative y direction in the positive x direction in the positive z direction in the negative x direction in quadrant III in quadrant II in quadrant IV in the negative z direction in quadrant I

Explanation / Answer

Using right hand rule, the B field at point O from the entire current is into the page, which is

-z direction option number 9

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