Figure shows a conducting loop $A D C A$ carrying current $i$ and placed in a region of uniform magnetic field $B_0$. The part $A D C$ forms a semicircle of radius $R$. The magnitude of force on the semicircle part of the loop is equal to
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(d)
The force on the semicircle part $A D C$, will be same as force on wire $C A$ and force on wire $C A=i(2 R)\left(B_0\right)$
(using $F = ilB$)
$=2 i R B_0$
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