Physics Class 12 Cbse

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class 12 physics 1 ncert textbook - unit vii
Nicola Tesla (1836 – 1943) Yugoslov scientist, inventor and genius. He conceived the idea of the rotating magnetic field, which is the basis of practically all alternating current machinery, and which helped usher in the age of electric power. He also invented among other things the induction motor, the polyphase system of ac power, and the high frequency induction coil (the Tesla coil) used in radio and television sets and other electronic equipment. The SI unit of magnetic field is named in his honour.

Language: english
PDF pages: 36, PDF size: 0.46 MB
class 12 physics 1 ncert textbook - unit vi
Electricity and magnetism were considered separate and unrelated phenomena for a long time. In the early decades of the nineteenth century, experiments on electric current by Oersted, Ampere and a few others established the fact that electricity and magnetism are inter-related. They found that moving electric charges produce magnetic fields. For example, an electric current deflects a magnetic compass needle placed in its vicinity. This naturally raises the questions like: Is the converse effect possible?.

Language: english
PDF pages: 29, PDF size: 0.59 MB
class 12 physics 2 ncert textbook - unit xii
. distance away. The electrons would be moving in orbits FIGURE 12.3 The dots are α-particle scattering data about the.’s using the experiment shown in Figs. 12.1 and experiments suggested the size of 12.2. The solid curve is the.

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PDF pages: 24, PDF size: 0.46 MB
class 12 syllabus physics
Brief review of conservative forces of which gravitational force and electric forces are examples; potential, pd and potential energy are defined only in a conservative field; electric potential at a point; definition VP=W/q0; hence VA -VB = WBA/ q0 (taking q0 from B to A) = (q/4πε0)(1/rA - 1/rB); derive this equation; also VA = q/4πε0 .1/rA ; for q>0, VA>0 and for q>d. Potential energy of a point charge (q) r in an electric field E , placed at a point P where potential is V, is given by U =qV .

Language: english
PDF pages: 12, PDF size: 0.25 MB
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