Question

State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it. 

Answer 1

Experimentally it is found that the magnitude of the force acting on a current carrying conductor kept in a magnetic field in a direction perpendicular to it, depends on the following factors: 

(i) The F is directly proportional to the length of the current carrying conductor, i.e., F ∝ l. 

(ii) F is directly proportional to the strength of the magnetic field, i.e., F ∝ B. 

(iii) F is directly proportional to the strength of the current flowing in the conductor, i.e., F ∝ i. 

Combining the above factors we find that: 

or F ∝ i Bl 

F = KiBl