1.

A coil in the shape of an equilateral triangle of sidel is suspended between the pole piecesof a permanentmagnet such that B fixed in planeof the coil if due tocurrentI in the trianglea troque gammaacts on it then side of the triangle is

Answer»

`(1)/SQRT(3)(R )/(B1)`
`(2)/sqrt(3)(r )/(b1)`
`(2)/sqrt(3)(r )/(bb1)^(1//2`
`(2)/sqrt(3)(r )/sqrt(3b1)^(1//2`

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