The discussion revolves around balancing magnetic forces on two parallel rods carrying currents in opposite directions. The original poster seeks to determine the mass of the upper rod required for balance, given the setup of the rods and their separation.
Some participants have provided guidance on assuming the lower wire is fixed and have mentioned relevant laws such as Biot-Savart's law and Ampere's law. However, there is still uncertainty regarding the calculation of magnetic field strength and how to apply these concepts.
Participants are navigating the constraints of the problem, including the need for specific assumptions about the fixed position of the lower rod and the lack of detailed information on the mass or length of the rods involved.
Thankyou, but how do you work the magnetic field strength?Mister T said:You need to assume the lower wire is held in a fixed position. It exerts a magnetic force ##IL\times B## on the upper wire.
Biot-Savart's law or Ampere's law will be useful here.Will Freedic said:Thankyou, but how do you work the magnetic field strength?
Will Freedic said:Thankyou, but how do you work the magnetic field strength?