question_answer 27)

         In an activity demonstrating the force acting on a current carrying conductor placed in a magnetic field as shown in figure how do we think the displacement of rod AB will be affected if (a) current in rod AB is increased?                         (b) a stronger horse-shoe magnet is used? (c) length of the rod AB is increased? 

Answer:

The displacement of the rod AB (a) will increase when the current in rod AB is increased. (b) will increase when a stronger horse-shoe magnet is used. (c) will increase when length of the rod AB is increased.