What is the magnitude of the force per unit length on a long wire of charge density λ from a wire that carries a current of 3 A and is a distance of 3 m away?
A)μλ/2 B)μλ/6 C)3μλ/2 D)μλ/3 E)0
The Attempt at a Solution
F=BIL→ (F/L)=BI →(F/L)=μI1I2L/2∏R
I dont know how to apply that λ. i would think that λ=Q/L, and i also dont know which current is which in that final equation i put (that may be a slightly tangential question, but i also need help understanding which is which if one could aid with that).