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Vidushi Saklani posted an Question
September 21, 2021 • 03:56 am
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30 points
30 points
- IIT JAM
- Physics (PH)
Why is magnetic field negative in both the cases because it is coming outwards at z=0?
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Anshum Sharma
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It is Negative Acc. to Right hand thumb rule which says that current is in the thumb direction and curl of the fingers are the Magnetic field. so Apply here, At z = -a, when the current is in +x direction then curl of the fingers are towrds the - y direction and similarly at z = a when current is in +y direction then the curl of the fingers are towrds - x direction .
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Vidushi saklani
could you plz tell how to find the resultant
Now try to understand that Resultant B is in -x and -y direction and from there you can make an angle with -x axis and x axis