A uniform conducting wire of length 12a and resistance R is wound up as a current (I) carrying coil in the shape of
A
an equilateral triangle of side a. 
and 
and
B
a square of side a. The magnetic dipole moments of the coil in each case respectively are [NEET 2021]
and 
and C
and 
D
and 
Text Solution
Verified by ExpertsThe correct answer is:
A
We know that, magnetic dipole moment, 
For case (1)
An equilateral triangle of side a.
Total wire length
n = 4
Area of the triangle,
Magnetic dipole moment,
For case (2)
A square of side 
.
Total wire length 
Perimeter of the square
Area of the square loop,
Magnetic dipole moment,
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