# Recent content by NewEinstein

1. ### Rotating Disk in Magnetic Field

oh thank you now i got it the lorentz field is always in the radial direction out of the disk so the positive charge is on b.. and yes that is the voltage between A and B but i also got it now from Ohm`s law
2. ### Rotating Disk in Magnetic Field

Hi im having a difficulty understanding how to write the circuit equation inside a disk which rotates in magnetic field. the disk is made of conductor material. the resistance of the disk is: r the answer is: ir=emf+v(a)-v(b) if someone could explain it would be great! and how do i know where is...