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Physics

Class 12 Physics
    Welcome to our Class 12 Physics page. On this page you can find physics notes, assignments, previous year question paper and lots of study materials for easy learning and understanding. You can share the link with your classmates as all the study materials are free of cost

Current Electricity
Moving Charges & Magnetism
Electromagnetic Induction
Alternating Current
Electromagnetic Waves
Ray Optics & Optical Instruments
Wave Optics
Dual Nature Of Radiation & Matter
Atom
Nuclei
Semiconductor Electronics
Communication System





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Class 12 Physics Chapter 1 Electric Charges and Fields Notes

Class 12 Physics  Chapter 1 Electric Charges & Fields  Notes Notes Of Class 12 Physics Chapter 1 Electric Charges and Fields - PDF Free Download Free PDF download for Plus Two physics revision notes and short key notes to score more marks in your exams. Electric Charges; Conservation of charge, Coulomb’s law-force between two point charges, forces between multiple charges; superposition principle and continuous charge distribution.  Electric field, electric field due to a point charge, electric field lines, electric dipole, electric field due to a dipole, torque on a dipole in uniform electric field. Electric flux, statement of Gauss’s theorem and its applications to find field due to infinitely long straight wire, uniformly charged infinite plane sheet and uniformly charged thin spherical shell (field inside and outside). Electric Charge, Method Of Charging, Basic Properties Of Charge Coulomb's Law, Coulomb's Law in vector form Electric Field, Electric Fi
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Energy Stored In A Capacitor Class 12 Physics Electrostatic Potential And Capacitance

Energy Stored In A Capacitor     We have already studied that capacitors store electrostatic energy in it. Today we will learn how they store energy? and how much energy can be store in a capacitor? As always to find the energy we have to find the work done. So, consider a small positive charge +dQ, work has to be done to transfer this small +dQ to move towards this positive plate(because it's against the electric field). This work is stored as potential energy. Work done W = charge X potential i.e, W =qV Here charge is dQ so we can write dW = dQ V = dQ Q/C               ( from equation Q = CV ) integrating on both sides we get  This equation consisted to be general equation. By substituting values of Q and C we get other 2 forms of energy stored in capacitor    applying Q = CV in equation (1) applying C = Q/V in equation (1)     Prev      Next You may be Interested In  Physics Previous Question Papers With Answers Browse more topics under Electrostatic Potential & Capacitance
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Equipotential Surface Class 12 Physics Electrostatic Potential Surfaces And Capacitance

#4. Equipotential Surface Equipotential is the surface which has equal potential at every point on it. Equipotential surface due to a single point charge are concentric spheres having the charge at the center. All the points on a sphere around a point charge have the same distance (radius) so all have same potential. Equipotential surface for a line charge is cylinder  Properties of Equipotential Surface Work done for moving a charge on an equipotential surface is zero The potential difference between any two points on equipotential surface is zero  Electric Field is always perpendicular to an equipotential surface Equipotential surface for a single point charge are concentric spheres having the charge at the center Two equipotential surfaces can never intersect.  Browse more topics under Electrostatic Potential & Capacitance Electrostatic Potential, Potential Energy, Potential Energy Difference Potential Due To A Point Charge Potential Due To An Electric Dipole Equipotential Surfa
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