Problem 3.244

Calculate the magnetic moment of a thin wire with a current $I=0.8$ A, wound tightly on half a tore (Fig. 3.66 $) .$ The diameter of the cross-section of the tore is equal to $d=5.0 \mathrm{~cm}$ , the number of turns is $N=500$ .

\begin{array}{c} \mathbf{3 . 2 4 4 .} \\ =0.5 \mathrm{~A} \cdot \mathrm{m}^{2} \end{array} \quad p_{m}={ }^{1 / 2} N I d^{2}=

Constant Magnetic Field, Magnetics