CBSE CLASS 12TH PHYSICS BOARD PAPER 2020

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IMPORTANT TOPICS FOR CLASS12 PHYSICS FOR BOARD EXAM

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IMPORTANT TOPIC FOR CLASS12TH PHYSICS CBSE BOARD EXAMINATION: Subject :  PHYSICS    By- Mamta Singh  Ch.-1 Electric flux Force and Torque on the electric dipole. Electric field on the axial and equatorial line.  Statement of Gauss-Theorem. Applications of Gauss- Theorem,all three applications of Gauss theorem especially charged spherical shell. Ch.-2 Capacitance and factor’s affecting capacitance.  Energy stored in a capacitor and its energy density( formula only). Capacitance of a parallel plate capacitor with a dielectric slab placed in between. (IMPORTANT) DRAW EQUIPOTENTIAL SURFACE TO A POINT CHARGE,LINE CHARGE,PLANE ELECTRIC FIELD AND DUE TO A ELECTRIC DIPOLE. Equi-potential surface and its properties. Relation between electric field and electric potential.  Effect on various parameters when a dielectric slab is introduced b/w the plates of parallel plate capacitor. Principe of parallel plate capacitor. Potential at any general point o...
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IMPORTANT TOPIC FOR CLASS 11TH PHYSICS

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Unit vector, triangle law of vector addition, parallelogram law of vector addition, projectile motion,Range,height and time of flight of projectile. Equation for the trajectory for the parabolic path of projectile.  Newton's second law as the real law of motion,banking of roads,motion in vertical circle,angle of friction,Acceleration up and down the inclined plane . State and prove work energy theorem,law of conservation of linear momentum, law of conservation of mechanical energy,conservation of mechanical energy, elastic collision and inelastic collision. Centre of mass of two particle system,radius of gyration, moment of inertia of a thin uniform rod,law of conservation of angular momentum and it's applications, torque,angular momentum, lever principal  and couple forces. Escape speed,orbital speed,Keplers law of planetary motion,gravitational potential energy.  Stress-strain curve,Hookes law,Bernoullies theorem, terminal velocity,Equation of continuity,sto...
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FREE-BODY DIAGRAM

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Free-body diagrams are diagrams that are used to show the relative magnitude and direction of all forces acting upon an object in a given situation. A diagram which shows a part of a system separately, indicating all the external forces acting on it ,is called as a free body diagram. These diagrams will be used throughout our study of physics. A free body diagram is a special example of the vector diagrams. In case of a free body diagram , a body is said to be "free" when it is singled out from other bodies for the purpose of dynamic or static study or analysis.
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