A straight conductor AB is placed in a magnetic field and carries current. Predict the effect on its displacement if:

(i) the current flowing through AB is increased,

(ii) a stronger horse-shoe magnet is brought in, and

(iii) the conductor AB is taken to be longer.
 
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1. If the current in the rod is increased, then the rod will be deflected .
 
2. If a stronger horse-shoe magnet is used, the rod will also be deflected  due to the  in the magnetic field.
 
3. If the length of the rod AB is increased, Deflection of rod in a magnetic field .