STANDARD Physics Magnetic Dipole Moment MCQ Question
A uniform conducting wire of length 12a and resistance R is wound up as a current carrying coil in the shape of - (i) an equilateral triangle of side a. (ii) a square of side a. The magnetic dipole moments of the coils in each case respectively are - I is the current through the coils.
4Ia² and 3Ia²
√3Ia² and Ia²
3Ia² and Ia²
3Ia² and 4Ia²
Correct Answer
Detailed Explanation
The magnetic dipole moment for a loop is given by the product of current and area. For the equilateral triangle, the area is (√3/4)a², and for the square, it is a². The respective dipole moments are calculated as 4Ia² and 3Ia².
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