CBSE Sample Paper Class 12th Physics(2022)

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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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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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Transverse nature of Electromagnetic Waves

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Electromagnetic waves are transverse in nature.Electromagnetic waves consist of an electric vector (E)  and a magnetic vector (B) mutually perpendicular to each other and they are also perpendicular to the direction of propagation of the wave. The electric vector (E) ,magnetic vector (B) and the propagation vector (K) form a right handed set (all the three mutually perpendicular to each other).
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