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  2. List of primary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_education...

    In fourth grade through ninth grade students begin being assessed in all subject areas and are graded using the 10 point scale. When students complete their 9 years of basic education they take a centralized national exam, which qualifies them for further education.

  3. Electricity - Wikipedia

    en.wikipedia.org/wiki/Electricity

    Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge.Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

  4. Hendrik Lorentz - Wikipedia

    en.wikipedia.org/wiki/Hendrik_Lorentz

    Painting of Hendrik Lorentz by Menso Kamerlingh Onnes, 1916 Portrait by Jan Veth Lorentz' theory of electrons. Formulas for the Lorentz force (I) and the Maxwell equations for the divergence of the electrical field E (II) and the magnetic field B (III), La théorie electromagnétique de Maxwell et son application aux corps mouvants, 1892, p. 451.

  5. National Council of Educational Research and Training

    en.wikipedia.org/wiki/National_Council_of...

    [26] [27] Again in 2022, a new controversy started when both CBSE and NCERT removed topics regarding Islamic Empires in the class 12 history textbook and chapters like “Challenges to Democracy” in the class 10 political science subject and many others, saying it is necessary to reduce syllabus to reduce examination pressure on students by ...

  6. Magnetic levitation - Wikipedia

    en.wikipedia.org/wiki/Magnetic_levitation

    The dimension of magnets varies between different versions, while typically in the range of 1.4 [29]-2 [28] mm square shape with a lower height. The poles of magnets were positioned as a checkerboard array to fit the magnetic field generated by the PCB platform. The robot can be built in different size depending on the size of the array.

  7. Oersted - Wikipedia

    en.wikipedia.org/wiki/Oersted

    The unit was established by the IEC in the 1930s [4] in honour of Danish physicist Hans Christian Ørsted.Ørsted discovered the connection between magnetism and electric current when a magnetic field produced by a current-carrying copper bar deflected a magnetised needle during a lecture demonstration.

  8. NCERT textbook controversies - Wikipedia

    en.wikipedia.org/wiki/NCERT_textbook_controversies

    In the Class 7 textbook topic titled “Our Pasts-2”, pages 48 and 49 have been excluded. These pages mentioned “Mughal Emperors: Major campaigns and events.” The deletions also affected Biology and Chemistry textbooks as the theory of evolution and the periodic table were also purged from class 10 NCERT textbooks. [35] [36]

  9. Solid-state physics - Wikipedia

    en.wikipedia.org/wiki/Solid-state_physics

    Solid-state physics is the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy.