By Gilbert T. Walker
Initially released in 1910, this booklet features a sequence of lectures almost about electromagnetism, brought through British physicist and statistician Gilbert T. Walker, sooner than the collage of Calcutta. Walker writes, 'The college of Calcutta did me the consideration early in 1908 to nominate me Reader, and requested me to bring a sequence of lectures upon a few topic, ideally electric, which might be of use to the teachers within the outlying schools in addition to to the extra complex scholars in Calcutta'. Chapters are special and large in scope; bankruptcy titles comprise, 'Vector analysis', 'Applications of vectorial tips on how to magnetostatics' and 'The electron concept of Lorentz utilized to desk bound media'. those informative lectures trap the very vibrancy and dynamism of the topic and clarify the math useful for a whole realizing. This e-book may be of price to somebody with an curiosity in electromagnetism, physics and the historical past of schooling.
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Extra info for Outlines of the Theory of Electromagnetism: A Series of Lectures Delivered before the Calcutta University
59 that ^dvpxx = 0, fdvpxy = Vr, \dvpxz = Vq, so that the operator and accordingly i J p v A A dx dy (45). Hence I = y$dvp [r rV, H] [[mV] H] . mH, for div H= Now 0, as the H is due to an external field. the force according to Maxwell's theory mV . H - V mH . is = - [m [VH]], by = 0, mV (2), . H and ELECTRON THEORY FOR STATIONARY MEDIA [VH] = rotH=0, for as 41 H due is to currents or magnetisation Hence the resultant force is mV . H away from the The couple acting on the group 63. the of section will be, omitting terms in Couples in a magneto- origin.
If C are the current, expressed as a vector, Let us consider a stationary medium in which there * s e l ectr i c density p in addition to, and apart from, any effect of the polarisation D', and also 60. Electro- magnetic ^stationary a conduction current C. medium. * The equations (41) will + Frot G' 4- C = Frot H ...... e. div ( E + D ') = p ; strictly magnetic matter, having merely electrons. Let us now introduce a new quantity Hj defined by then the equations become -(E + D')+ C=FrotH with div(E + D') = /3, div(H 1 + 1 G') = .........
R, H + rV . H]) Now medium since the magnetic no supposed to have no charge and is Thus the resultant becomes electric polarisation. rV, H]. 59 that ^dvpxx = 0, fdvpxy = Vr, \dvpxz = Vq, so that the operator and accordingly i J p v A A dx dy (45). Hence I = y$dvp [r rV, H] [[mV] H] . mH, for div H= Now 0, as the H is due to an external field. the force according to Maxwell's theory mV . H - V mH . is = - [m [VH]], by = 0, mV (2), . H and ELECTRON THEORY FOR STATIONARY MEDIA [VH] = rotH=0, for as 41 H due is to currents or magnetisation Hence the resultant force is mV .
Outlines of the Theory of Electromagnetism: A Series of Lectures Delivered before the Calcutta University by Gilbert T. Walker