In Activity 13.7. how do we think the displacement of the rod AB will be affected if (i)the current in rod AB is increased : (ii) a stronger horse - shoe magnet is used , and (iii) the length of the rod AB is increased ?

Explanation

Experiments have shown that, when a current - carrying conductor is placed in a magnetic field , the force acting on the conductor is initially at rest ) is proportional toi…..
(a) the current in the conductor .
(b) the strength of the magnetic field .
(c) the lenght of the conductor .
(i) When the current in the rod AB is increased , the more force will act on the rod and hence the displacement of the rod will also be more ( in the same proportion.
(ii) If a stronger horse - shoe magnet is used then the strenght of mgnetic field will increases leading to a greater froce on the rod . Due to the greater force , the displacement of the rod will also be more ( in the same propotion).
(iii) If the lenght of the rod AB is increased, the more force will act on the rod and hence the displacement of the rod will also be more ( in the same proportion).