A current balance is set up so that a mass of 20.0 mg on the upper wire restores balance?

to the system when a current of unknown magnitude is sent through both wires. The wires are 26.5 cm long and have a center-to-center seperation of 0.0525 cm. Find the current.|||use Ampere's law. The first wire sets up a B-field equal to





B=ui/(2蟺d) The force is Bil=ui^2l/(2蟺d)=


4蟺E-7*i^2*0.265/(2蟺*5.25E-4)=20E-3 ==%26gt;i=14.1A