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Figure shows a bent coil with all edges ...

Figure shows a bent coil with all edges of length 1m and carrying a current 1 A.
a. Find the magnetic moment of the loop.
b. Find the torque acting on the loop.

Text Solution

Verified by Experts

Join additional at AH and DH carrying same current in opposite
directions. It will not affect the overall loop. Loop ABGH and DCEF
will cancel as their magnetic moment are in opposite directions.

(a) Net magnetic moment of the loop=Magnetic moment of
`ADFH=il^2hati=hatiAm^2`
(b) `vecB=Bhatj, vectau=vecMxxvecB=hatixxBvecJ=BhatkNm`
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