Physics · Magnetic Effects of Current
A uniform conducting wire of length 24a and resistance R is first wound into a current-carrying coil in the shape of an equilateral triangle of side a, and then rewritten into a square coil of side a. If both coils are connected to the same voltage source V0, the ratio of the magnetic moment of the equilateral triangle coil to that of the square coil is 1 : √y, where y equals:
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Correct answer
3
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