AAI ATC Junior Executive 25 Mar 2021 Shift 2 Paper

A uniform magnetic field of 2 T exists in a cylindrical region of radius 10 cm, its direction parallel to the axis from east to west. A wire carrying current 6 A in the north to south direction passes through the region. What is the magnitude of the force on the wire if 
(a) the wire intersects the axis
(b) the wire in the N-S direction is lowered from the axis by a distance of 6 cm?
(Given: Length of wire =  20 cm)