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(iii) It is not valid for distributed charge system. - [Motional EMF Physics Class 12](https://physicsbymanwar.com/motional-emf-physics-class-12/): Motional EMF (Electromotive Force) – Class 12 Physics In Class 12 Physics, motional EMF is a key concept in electromagnetic induction, which occurs when a conductor moves in a magnetic field, generating an electromotive force (EMF) across its ends. What is Motional EMF? When a conductor moves through a magnetic field, it cuts through the magnetic lines of force. This motion generates an EMF in the conductor due to the Lorentz force acting on the free charges (usually electrons) within it. This phenomenon is called Motional EMF. 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Magnetism & Matter 6. Electro Magnetic Induction 7. Alternating Current 8. Electromagnetic Wave 9. Ray Optics 10. Wave Optics 11. Atoms 12. Nuclei 13. Dual Nature of Radiations & Matter 14. SemiConductor - [Physics Pdf Notes](https://physicsbymanwar.com/physics-pdf-notes/): 12th English Medium 12th Hindi Medium 11th English Medium 11th Hindi Medium - [Class 11 Physics Handwritten Notes](https://physicsbymanwar.com/class-11-physics-handwritten-notes/): Class 11 Physics Handwritten Notes 1.  Units & Measurements 2. Motion in a straight line 3. Motion in a plane 4. Laws of motion 5. Work Energy & Power 6. System of particles & rotational motion 7. Gravitation. 8. Mechanical properties of solids 9. Mechanical properties of fluids 10. Thermal properties of matter 11. Thermodynamics 12. Kinetic theory 13. Oscillations 14. 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