A conductor (shown in the figure) carrying constant current I is kept in the x-y plane in a uniform magnetic field  $\stackrel{\rightharpoonup }{B}$.  If F is the magnitude of the total correct statement (S) is (are)

Since, $\overrightarrow{F}=i\left(\overrightarrow{l}\times \overrightarrow{B}\right)$ 

If the magnetic field is along z-axis or y-axis, the wire can be considered as a straigt wire of length 2L+2R.
$\overrightarrow{F}=\left[2\left(L+R\right)i\times \overrightarrow{B}\right]$ 
If $\stackrel{\rightharpoonup }{B}$  is along x-axis Then $\overrightarrow{F}$ = O
Other wise $F\propto \left(L+R\right)$