$($a$)$ Calculate the magnetic force acting on a $50$ cm wire which

carries $3\mathrm{.}8($A$)$ of electric current and is located in a magnetic field with strength of

$16($T$).$ The angle between B and direction of I is $30$

$$

$($b$)$ In which direction is the force?

$($a$)$ F is perpendicular to the plane of B and $1,$ and is directed upward.

$($b$)$F is perpendicular to the plane of B and $1,$ and is directed downward

$($c$)$ F is parallel to B

$($d$)$F is parallel to direction of I