. A uniform conducting wire of length \(12 a\) and resistance \({ }^{\prime} R^{\prime}\) is wound up as a current carrying coil in the shape of,
(i) an equilateral triangle of side ' \(a^{\prime}\).
(ii) a square of side \(^{\prime} a^{\prime} .\)
The magnetic dipole moments of the coil in each case respectively are:
(A) \(\sqrt{3} I a^{2}\) and \(3 I a^{2}\)
B \(3 I a^{2}\) and \(I a^{2}\)
c) \(3 \mathrm{Ia}^{2}\) and \(4 \mathrm{Ia}^{2}\)
D \(4 \mathrm{Ia}^{2}\) and \(3 \mathrm{Ia}^{2}\)
