Which of the following statement is (are) correct in the given figure ?

Options

A. Net force on the loop is zero
B. Net torque on the loop is zero
C. Loop will rotate clockwise about axis `OO'` when seen from O
D. Loop will rotate anticlockwise about`OO'` when seen from O

Answer

A, C

Explanation

`F_(BA)=0`, because magnetic lines are parallel to this wire.
`F_(CD)=0` because magnetic lines are antiparallel to this wire.
`F_(CB)` is perpendicular to paper outwards and `F_(AD)` is perpendicular to paper inwards. These two forces (although calculated by integration) cancel each other but produce a torque which tend to rotate the loop in clockwise direction about an axis OO’