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Equation
       
    Name

Force on a Current

 
    Equation d ⁢ F = I ( d ⁢ I × B ) F = B ⁢ I ⁢ l ⁢ sin ⁢ θ
 
    Definition of terms

F = force, I = current, l = length of conductor, B = magnetic field, θ = angle between line of action of magnetic field and current

 
    Comments

  The first equation gives the force on a infinitesimal length d l of conductor. Assuming a straight conductor of length l , this reduces to the second equation.

 
    References

University Physics, F W Sears, M W Zemansky, 3rd edition, Addison-Wesley, 1967
       


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