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Physics Important Derivation for Class 12th (CBSE) - Chapter-Wise
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# Physics Important Derivation for Class 12th (CBSE) – Chapter-Wise

Class XII board syllabus covers a considerable chunk of the JEE Syllabus; therefore, it is very important for the students to be thorough with the topics of the board examination. If a candidate scores well in the board examination, the chances are that they might score well in the JEE Exam as well. The CBSE exam is set to be conducted from 04 May to 10 June 2021. The students should take advantage of the time in hand and thoroughly brush up on the important topics in order to score better in the examination. In this article, we will give you the complete list of the Physics Important Derivation which comprises a very important section of the syllabus.

## Physics Important Derivation 2021

Here we are going to list all the important chapter-wise derivations of Physics for Class 12th:

Unit No 1: Electrostatics

1. Coulomb’s Law in Vector Form
2. Newton’s Third Law
3. Electric Field Intensity on Axial Line & Equatorial Line of an Electric Dipole
4. Electric potential due to a point charge.
5. Electrical Potential on Axial Line & Equatorial Line of Electric Dipole
6. Electric Field Intensity at various points due to a uniformly charged spherical shell (thin and thick both)
7. Electric potential due to a thin infinite plane sheet of charge
8. The capacitance of parallel plate capacitor (with or without dielectric medium)
9. Application of Gaus Theorem

Unit No 2: Current Electricity

1. Expression of drift velocity
2. The relation between drift velocity and current
3. series and parallel connection of resistors
4. Application of Gaus Theorem for the calculation of electric field intensity due to a thin infinite plane sheet of charge and uniformly charged spherical shell (or conducting sphere)

Unit No 3: Magnetic Effects of Current and Magnetism

1. The Biot-Savart law for the calculation of the magnetic field due to current carrying circular loop
2. Ampere’s law and its application
3. Force on a moving charge in uniform magnetic and electric fields
4. Cyclotrons
5. Force on a current-carrying in a uniform magnetic field
6. The force between two parallel current-carrying conductors
7. Torque experienced by a current loop in uniform magnetic fields
8. Current loop as a magnetic dipole and its magnetic dipole moment
9. The magnetic dipole moment of a revolving electron
10. Magnetic field intensity due to magnetic dipole (bar magnetic) along its axis and its perpendicular axis
11. Torque on a magnetic dipole (bar magnet) in a uniform magnetic field

Unit No 4 Electromagnetic Induction and Alternating Current

1. EMF (i.e. EMF induced in a rod moving in Uniform EMF)
2. Self and mutual induction
3. The relation between peak and RMS value current
4. Reactance, impedance, and average power in series LCR, LR, CR circuit
5. Resonance in the case of the series LCR circuit

Unit No 5: Electromagnetic Waves

1. Displacement Current

Unit No 6: Optics

1. Lens-Makers Formula
2. Refraction at convex surfaces
3. Refraction index at minimum deviation in prism
4. Young’s double-slit experiment
5. Diffraction using a single slit
6. Polarisation
7. Minimum deviation in prism

Unit No 7: Dual nature of radiation and matter

1. Relationship between cut off potential, frequency of the incident photon, and threshold frequency
2. De Broglie relation

Unit No 8: Atoms and Nuclei

1. The radius of hydrogen-like atoms

Unit No 9: Electronic Devices

1. Common base transistor (CBT) amplifier
2. Common emitter transistor (CET) amplifier

Unit 10: Communication system

1. AM and FM (Amplitude and frequency modulation)

In the above-given list, we have listed those topics which are frequently asked in the class XII Physics Exam and the ones which are the most important from the board exam point of view. These derivations will help students to prepare for JEE Main Syllabus as well as the Board Exam simultaneously.

### Yashrika Bhardwaj

Yashrika is an Electronics Engineer passionate about technology and integrating it with innovative ideas to give startups an initial boost that they require.