Materials and Components - Engineering

Q1:

A conductor carries 10 A current in + x direction and is lying in a field having a flux density 0.2 T directed along + z direction. The magnitude of force per metre length and direction are

A 2 N, + y direction

B 2 N, - y direction

C 0.02 N, + y direction

D 0.02 N, - y direction

ANS:B - 2 N, - y direction

How in -y direction?