Physics can be a scary ordeal for some and a very interesting subject for the rest. There are many scholars who want a program or some tips about important topics that supports and helps them in studying physics. With a proper preparation strategy, idea about the important questions, derivations and formulas in physics, a student can definitely score well in the main physics exam.Here we would like to provide the important derivations of CBSE class 12
physics class 12 to help you score well in boards.
The syllabus of CBSE class 12 physics is vast. It contains a total of 10 units or 15 chapters. It is important for students to know the important topics and derivations in class 12 physics to study efficiently. Given below are the important derivations for class 12 physics.
Electrostatics(Unit 1) 
 Coulomb’s Law in the form of vectors – \(\vec{F_{12}}=\vec{F_{21}}\)
 Application of Gauss theorem in calculation of electric field
 Electric field intensity due to a thin infinite plane sheet of charge
 Electric field intensity of an electric dipole on equatorial line – \(E_{R}=\frac{1}{4\pi \varepsilon _{0}}\frac{P}{r^{3}}\)
 Electric field intensity of an electric dipole on axial line – \(E=\frac{1}{4\pi \varepsilon _{0}}\frac{2P}{r^{2}}\)
 Electric field intensity due to a uniformly charged spherical shell at various points
 Capacitance of a parallel plate capacitor with dielectric medium
 Capacitance of a parallel plate capacitor without dielectric medium
 Electric potential due to a point charge – \(V(r)=\frac{Q}{4\pi \varepsilon _{0}r}\)

Current Electricity(Unit 2) 
 Application of Gauss theorem in calculation of electric field intensity due to thin infinite plane sheet of charge uniformly charged spherical sphere
 Relation between current and drift velocity
 Expression for drift velocity
 Series and parallel connection of resistors

Magnetic Effect of Current and Magnetism(Unit 3) 
 Torque experienced by a current loop in a uniform magnetic field
 Ampere’s law and its application to infinitely long straight wire. Straight and toroidal solenoids.
 Magnetic dipole moment of a revolving electron
 Apply BiotSavart law to derive the expression for the magnetic field on the axis of a current carrying circular loop.
 Force between two parallel current carrying conductors
 Torque on a magnetic dipole (bar magnet) in a uniform magnetic field.
 Current loop as a magnetic dipole and its magnetic dipole moment
 Force on a current carrying conductor in a uniform magnetic field
 Force on a moving charge in uniform magnetic and electric field.

Electromagnetic Induction And AC(Unit 4) 
 Self and mutual induction
 Derivation of Emf induced in a rod moving in a uniform magnetic field.
 Impedance, reactance and average power in series LCR, LR, LC or CR circuit.
 Relation between peak and rms value of current
 Derivation for resonance in a series LCR Circuit

Electromagnetic Waves(Unit 5) 
 Derivation of displacement current

Optics(Unit 6) 
 Refraction at convex surfaces
 Diffraction using single slit
 Derivation of refractive index of minimum deviation in the prism
 Young Double Slit Experiment
 Derivation of the formula for angle of minimum deviation for the prism

Dual Nature of Radiation and Matter(Unit 7) 
 Derivation of the DeBroglie Relation
 Relation between threshold frequency, frequency of the incident photon and cutoff potential

Nuclei and Atoms(Unit 8) 
 Derive \(N=N_{0}e^{\lambda t}\)
 expression of radius in hydrogen like atoms

Electronic Devices(Unit 9) 
 Common emitter transistor amplifier
 Common base transistor amplifier

Communication System(Unit 10) 
 Frequency modulation and amplitude modulation

The above listed were a few important derivation of CBSE class 12 physics that are most likely to be asked in the coming board exams. While studying for the board exam, students can plan accordingly giving priority to the above mentioned topics.
You can also download the important derivations in physics class 12 CBSE PDF to get well acquainted with all the derivations and answer related questions accurately in the class 12 board exam.