Right hand rule - Magnetic field

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Homework Statement



Conventional current flows in a ring in the direction indicated in the diagram (if you stand at location A, on the +x axis, and look toward the ring, current flows clockwise). At each of the locations labeled by a letter, use the right hand rule to find the direction of the magnetic field at that location, due to the current in the ring.

18-079-ring_field_6locs_sym.jpg


Homework Equations



Right hand rule

The Attempt at a Solution



I already know the answers, which was given to me:

Location A = -x
Location B = +x
Location C = -x
Location D = +x
Location E = +x
Location F = +x

But I don't know how to apply the right hand rule to find the direction of the magnetic field? Can anyone explain it to me thoroughly, please?
 

Answers and Replies

  • #2
33
3
It's just like any other cross product. AxB
Step 1: You put your open palm with your fingers pointing in the same direction as the first vector A ( in your example it is I)
Step 2: Without moving anything but your fingers, point to the direction of the point whose magnetic field you examine.
Step 3: The magnetic field at this point is given by the direction of your extended thumb without moving your hand.
Watch this too:
 
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