3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of \[30{}^\circ \] with the direction of the field. It experiences a force of magnitude [MP PET 1993]

• A.            \[3\times {{10}^{4}}\,newton\]                                       
• B.            \[3\times {{10}^{2}}\,newton\]
• C.            \[3\times {{10}^{-2}}\,newton\]                                     
• D.            \[3\times {{10}^{-4}}\,newton\]