two long conductor separated by distance d and carry currents I1 and I2 in the same direction they exert a force of f on each other .now current in one of them is increase in two times and its direction is reversed the distance is also to 3d the new value of the force between them is ? find it with a formula
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i won't answer it to the full; i want you to think and derive the answer on your own
Hint1: find out the formula for attraction b/w 2 wires.
Hint 2: using d,i1,i2, find a relation with f.
Hint3: replace the new values in formula of Hint 1, and try expressing it in terms of f
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