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The Wimshurst Machine

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-337

2025-11-30

503

has two glass disks, both of which rotate, but in opposite directions. Tin-foil sectors are attached to the outside of each plate. For convenience in explaining the action of this machine, in Fig. 2 the glass disks are replaced by glass cylinders, one inside the other, and shown in section. AA' and BB' are the cylinders, the sectors on AA' being on the outside, and those on BB' being on the inside, CC" and DD' are the diagonal rods, tipped with brushes; and EE' and FF' are the collecting brushes. Only the slightest difference of potential is needed to start the induction. Suppose the sectors near A to have a slight+ charge. This will induce a - charge on C, while the repelled + will go to C'. The sectors that come in contact with the brushes on C and C" will receive slight charges which will in turn act inductively on the outer sectors; the rod DD' acting like the rod CC". At the collecting brushes E and E' the - charge on each cylinder repels that on the other to E and E' and the terminal T'. In a similar way a + charge collects on T.