Question

derive the expression for magnetic force acting on arbitrarily shaped wires assuming realtion for straight wire​

Answer 1

Answer:

F=GM1*M2/radius²

Note value of G is 6.27*10-¹¹

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Answer 2

Lorentz force:   F ˉ =q(  v ˉ  ×  B ˉ )

For a wire carrying charges

F ˉ =I∫dt×  B ˉ

∴∣F∣=BIL

per unit length

Now, Force between two current carrying conductor if carries in same line/direction  

∴ Attractive force;  

F=  2πd Bi  1  i 2

distance between

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