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A course of simple experiments in magnetism and electricity


A course of simple experiments in magnetism and electricity

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    Available in PDF Format | A course of simple experiments in magnetism and electricity.pdf | English
    Alan Edward Munby (Author)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...will show the electricity withdrawn, and hence capacity of the foil) compare with that obtained before? 53. Change of electric capacity in the neighbourhood of conductors. A. Into the face of the flat end of each of your cylinders, insert the metal plate of an electrophorus: place each of the cylinders on its ebonite rod, and connect one by a wire to the electroscope.1 Give the whole a charge by induction from a charged ebonite rod. Bring the other insulated cylinder as near as possible without contact, so that the metal plates face one another (Figure 44). Note the effect Separate the plates. Fk:. 44.--Parallel plate condenser made from cylinders and electrophorus lids. on the electroscope. Is the divergence restored? B. Repeat the last experiment, but this time hold the uncharged cylinder in the hand when near the charged cylinder. Remove the uncharged cylinder, spread out your hand and bring it near the charged plate. Does it act in a similar way? 1 A small staple, or a tack, should be driven into the round end of one of die cylinders for this purpose. THE LEYDEN JAR. 45 It will be a help in explaining the above results if it is remembered that the induced charge, which, of course, is present on the uncharged cylinder, will react on the charged plate, to some extent neutralizing it as long as it remains in the neighbourhood. This lowers the potential, and thus increases the capacity of the charged plate. The cause of the much greater effect on 'earthing' the uncharged plate should now be easily capable of explanation. The practical effect is, that the capacity being increased, we can put into a conductor, under these conditions, much more electricity than would otherwise be possible. Such an arrangement is therefore called a Condenser. 54. Inductive capa...
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Book details

  • PDF | 32 pages
  • Alan Edward Munby (Author)
  • (6 Mar. 2012)
  • English
  • 2
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