1.66 Force between two strips ** (a) The two strips of charge shown in Fig. 1.47 have width b ,… 1 answer below »

1.66                  Force between two strips **

(a)      The two strips of charge shown in Fig. 1.47 have width b,

infinite height, and negligible thickness (in the direction per- pendicular to the page). Their charge densities per unit area are

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±σ . Find the magnitude of the electric field due to one of the strips, a distance x away from it (in the plane of the page).

(b)      Show that the force (per unit height) between the two strips equals σ 2b(ln 2)/π E0. Note that this result is finite, even though you will find that the field due to a strip diverges as you get close to it.

 

 

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