Electricity and Matter
Format: Paperback
ISBN13: 9780217946643
Paperback|9780217946643
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: CHAPTER III EFFECTS DUE TO ACCELERATION OF THE FARADAY TUBES Rontgen Rays and Light We have considered the behavior of the lines of force when at rest and when moving uniformly, we shall in this chapter consider the phenomena which result when the state of motion of the lines is changing. Let us begin with the case of a moving charged point, moving so slowly that the lines of force are uniformly distributed around it, and consider what must happen if we suddenly stop the point. The Faraday tubes associated with the sphere have inertia; they are also in a state of tension, the tension at any point being proportional to the mass per unit length. Any disturbance communicated to one end of the tube will therefore travel along it with a constant and finite velocity; the tube in fact having very considerable analogy with a stretched string. Suppose we have a tightly stretched vertical string moving uniformly, fromright to left, and that we suddenly stop one end, A, what will happen to the string ? The end A will come to rest at once, but the forces called into play travel at a finite rate, and each part of the string will in virtue of its inertia continue to move as if nothing had happened to the end A until the disturbance starting from A reaches it. Thus, if V is the velocity with which a disturbance travels along the string, then when a time, t, has elapsed after the stoppage of A, the parts of the string at a greater distance than Vt from A will be unaffected by the stoppage, and will have the position and velocity they would have had if the string had continued to move uniformly forward. The shape of the string at successive intervals will be as shown in Fig. 12, the length of A Fio. 12. the horizontal portion increasing as its distance from the fixed end increa...
| ISBN-13 | 9780217946643 |
|---|---|
| ISBN-10 | 021794664X |
| Weight | 0.27 Pounds |
| Dimensions | 9.00 x 6.00 x 0.18 In |
| List Price | $14.14 |
| Format | Paperback |
|---|---|
| Pages | 74 pages |
| Publisher | |
| Published On | 2009-08-01 |
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