typically the electric forces are greater than the magnetic ones. Let’s consider two parallel wires, placed at a distance d, each holding a constant line charge λ. Both wires move along their own axis at a speed v, therefore remaining in the same position (they are infinitely long) but creating a magnetic field. The two wires therefore repel each other because they old the same charge, however attract each other due to the magnetic force that they originate. At which speed would the two forces be the same. Is this speed more or less than the speed of light?
typically the electric forces are greater than the magnetic ones. Let’s consider two parallel wires, placed at a distance d, each holding a constant line charge λ. Both wires move along their own axis...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...