Direction of the Magnetic Field due to a Wire Conceptual Question

Find the direction of the magnetic field at each of the indicated points.

For the following two questions consider the wire shown in the figure.

Part A: What is the direction of the magnetic field

at Point A?

(A)

is out of the page

(B)

is into the page

(C)

is neither out of nor into the page and

(D)

Part B:  What is the direction of the magnetic field

at Point B?

(A)

 is out of the page

(B)

 is into the page

(C)

 is neither out of nor into the page and

(D)

= 0 

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Revelant knowledge 

The magnet field is a space within a magnet’s vicinity where the magnet’s magnetic properties act. Every magnet creates an own magnetic field. This may interact with other magnets and can even draw other magnets. This is why iron nails are pulled towards a bar magnet, even though there isn’t connection between the two. The magnetic field is only present at some proximity to the magnet. Its strength grows as the proximity to the magnetic field decreases and decreases as distance increases.