Figure shows a conducting loop \( A D C A \) carrying current \( i ...

Figure shows a conducting loop \( A D C A \) carrying current \( i \) and placed in a region of uniform magnetic
\( \mathrm{P} \) field \( B_{0} \). The part \( A D C \) forms a semicircle of radius
\( \mathrm{W} \) \( \boldsymbol{R} \). The magnitude of force on the semicircle part of the loop is equal to
(1) \( \pi R i B_{0} \)
(2) Zero
(3) \( 2 \pi R i B_{0} \)
(4) \( 2 i R B_{0} \)
\( \frac{\pi}{G}(\mathrm{Ctrl}) \) )