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Explanation of the third lesson (Magnetic force and torque) from the second chapter (Magnetic effect of electric current and measuring devices) from the first unit (Current electricity and electromagnetism) for the third secondary grade 2025, part one ---------------------------------------------------------------------------- Learn physics for free via the Internet (online) for the secondary stage (first, second and third grades) with Engineer Abdel Rahman Ashraf Al-Nawawi, through an explanation of the physics curriculum in an easy way and using interactive images and solving exercises in the exam book, all of the 2025 version, in addition to an exam to follow up on your level and solve previous exams #Abdel Rahman Ashraf #Physics #Secondary_stage #Abdel Rahman Al-Nawawi #Third_secondary_grade #Third_secondary