Magnetic field induction determining

A square frame with a side length of a = 2 cm consisting of N = 100 winds of a thin wire is suspended by an elastic thread. The thread elasticity C is equal to C = 10 jN/m grad. The frame plane coincides with an external magnetic field induction. Determine the field induction if at a current I = 1 A the frame plane is turned at angle a = 60° (Figure E5.11). 

Determine the magnetic field induction B produced by a section of infinitely long wire at point A at a distance Vq = 20 cm from the center of the wire segment (Figure E5.2). The flowing current I = 30 A, the segment length / = 60 cm. 

To illustrate the use of the vector operators described in the previous section, consider the equations of Maxwell. In a vacuum they provide the basic description of an electromagnetic field in terms of the vector quantifies the electric field and 9C the magnetic field The definition of the field in a dielectric medium requires the introduction of two additional quantities, the electric displacement SH and the magnetic induction. The macroscopic electromagnetic properties of the medium are then determined by Maxwell s equations, viz. 

The field vector determining the Forentz force on a current is the magnetic induction B, which is measured in teslas. In principle, B at a point P can be... 

M. Krachler, T. Prohaska, G. Koellensperger, E. Rossipal, G. Stingeder, Concentrations of selected trace elements in human milk and in infant formulas determined by magnetic sector field inductively coupled plasma-mass spectrometry, Biol. Trace Elem. Res., 76 (2000), 97-112. 

Begerov, J., Turfeld, M., Duneman, L. Determination of physiological palladium, platinum, iridium and gold levels in human blood using double focusing magnetic sector field inductively coupled plasma mass spectrometry. J. Anal. At. Spectrom. 12, 1095-1098 (1997)... 

M. Krachler, A. Alimonti, F. Petrucci, K. J. Irgolic, F. Forastiere, S. Caroli, Analytical problems in the determination of platinum-group metals in urin by quadrupole and magnetic sector field inductively coupled plasma mass spectrometry. Anal. Chim. Acta, 363 (1998), 1-10. 

A capacitively coupled reactor designed to permit continuous coating of a moving substrate with plasma polymer has been described [ 1 ]. In this paper the results of a study of the plasma polymerization of tetrafluoroethylene in such a reactor presented. Plasma polymer has been deposited on aluminum electrodes as well as on an aluminum foil substrate placed midway between electrodes. The study particularly explores conditions in which deposition is minimized on the electrode. For this reason the chemical nature of the polymer formed in a low flow rate (F = 2 cm (S.T.P.)/min) and low pressure (p = 60 mlllltorr) plasma has been analyzed by the use of ESCA (electron spectroscopy for chemical analysis) and deposition rate determinations. This method combined with the unusual characteristics of TFE plasma polymerization (described below) has yielded Information concerning the distribution of power in the inter-electrode gap. The effects of frequency (13.56 MHz, 10 KHz and 60 Hz), power and magnetic field have been elucidated. The properties of the TFE plasma polymer prepared in this apparatus are compared to those of the plasma polymer deposited in an inductively coupled apparatus [2,3]. 

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