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  Physics Investigatory Project : Electromagnetic Induction The document is a research project on electromagnetic induction. It introduces electromagnetic induction, describing it as the production of voltage in a conductor exposed to a changing magnetic field. It covers Michael Faraday's experiments, which led to the discovery of this principle, and explains Faraday's two laws of induction. Applications discussed include electrical generators and credit card machines. --------------------------------------------------------------------------------------------------------------------------  

  CBSE CLASS XII,  MAGNETIC EFFECT OF CURRENT , PHYSICS NOTES- (PART V) MAGNETIC EFFECT OF CURRENT NCERT Class XII Physics Chapter 4th. Magnetic Effect of  Current Notes Study Material and Notes of Chapter 3 Magnetic Effect of current Class XII Physics ACCORDING TO THE CBSE SYLLABUS 2025-26 APPLICATION OF AMPERE’S LAW TO A STRAIGHT CONDUCTOR Let us make a circular loop of radius r around an infinitely long straight wire carrying current I. As the field lines are circular, the magnetic field at any point of the circular loop is directed along the tangent to the circle at that point.  By symmetry, the magnitude of magnetic field is same at every point of the circular loop.  From Ampere’s  circuital law