Geophysik III / Geophysics III (Handbuch der Physik Encyclopedia of Physics) (English, French and German Edition) - Hardcover
Sect. 14. 297 for such slow variations the effect described under 2. above will be by far the most predominant. In fact, the equipment provides a record of the time derivative of the element in question. 6) Records of the time derivatives of magnetic elements can, however, be obtained in a more direct way by recording directly the electromotive force (e. m. f. ) induced in suitably disposed coils by the variations of the geomagnetic field 10, 11. When a coil with the total winding area F is placed with its axis in the direction of a geomagnetic force component the variation of magnetic induction B with time will produce an electromotive force 1 dB 1 dH e=- coveu, uuFdT=- 'oV, uQf1oFdT (i). )) . !. . =_to-13 d(B/y) (1). )a) v em! d(tjs) in the coil. The e. mJ. may be amplified and recorded by means of an oscillograph or on a tape recorder. but more often the coil is used in connection with an ordinary galvanometer and the scale value of, for instance the dl1/dt record, will then - in the same way as the scale value of the magnet variometer treated in Subsect. IX - be dependent on the damping factor IX and on TO/T, where To and T are the oscillation periods for the undamped galvanometer and for the magnetic pulsation respectively. The amplitude recorded will be proportional to the amplification factor I, obtained from Eq. (1).
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- PublisherSpringer
- Publication date1972
- ISBN 10 3540055835
- ISBN 13 9783540055839
- BindingHardcover
- Edition number1
- Number of pages2464
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Geophysik III, Teil IV. Band XLIX/4. Handbuch der Physik / Geophysics III, Part IV. Volume XLIX/4. Encyclopedia of Physics (English, French and German Edition)
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Handbuch der Physik, Geophysik III, Teil 4 (IV) / Encyclopedia of Physics, Geophysics III , Part 4
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ENCYCLOPEDIA OF PHYSICS, Geophysics III/4
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Springer - Verlag, Berlin
(1972)
ISBN 10: 3540055835
ISBN 13: 9783540055839
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Book Description Hard Cover. Condition: Near Fine. Dust Jacket Condition: Good-. 582 pages in excellent condition. Many tables and figures. Green cloth with gilt titles on the spine. Corners not bumped. Small stamp and signature on the ffep. Yellow DJ with black titles. Jacket is soiled and stained. Three inch tear on lower jacket. Binding tight. NEAR FINE/GOOD-. Seller Inventory # 210694
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