# Physics Important Derivation for Class 12th (CBSE)

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Every JEE Aspirnats is preparing for boards exam as well it is expected as per the past year trends that this year boards exam as well conducted by the CBSE in the month of March 2019 but the JEE Main conducting authority has been changed; from 2018 JEE Main will be conducted by the NTA (National Testing Agency) and the JEE Main Application form will be available from the 1st Septmebr 2018. As this year the conducting authority has been changed so it can that JEE Main Question paper level will be difficult or it can be it will be easier from the previous year. As the syllabus is too vast for both JEE Main and as well for board exam. So here we are going to talk about Physics Subjects. Physcis Syllabus cover from 15 Chapter in the class 12th. As candidtes need to prepare for board exam at the same time candidates need to prepare for JEE Main 2019 which is the national level engineering entrance exam. The natinonal level engineering entrance examination is conducted to provide admission to the top engineering college i.e. IITs, NITs, and GFTIs.  Get complete list of the physics important derivation which can be asked previously.

Every Students wants to know that the important derivation list which can be asked in JEE Main Examination. Here we are listing few point which students asked:

• Which are the topics that can be asked in Board exam?
• Which derivation do i need to prepare for Board exam?
• Which are derivation after through with i got 70% of marks in the board exam.

## Physics  Important Derivation

Here we are going to list all the important derivation with chapter wise for Class 12th physics:

### 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 point due to a uniformly charged spherical shell (thin and thick both)
7. Electric Potential due to a thin infinite plan sheet of charge
8. 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. Relation between drift velocity and current
3. series and parallel connection of resistors
4. Application of Gaus Theorem is calculation of electric field intensity due to a thin infinite plane sheet of charge and uniformly charged spherical shell (or conducting sphere)

### Unit No:03: Magnetic Effects of Current and Magnetism

1. The biot-savert law in the calculation of 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. 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. 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: 04 Electromagnetic Induction and Alternating Current

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

### Unit No 05: Electromagnetic Waves

1. Displacement Current

### Unit No 06: 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 single slit
6. Polarisation
7. Minimum deviation in prism

### Unit No 07: Dual nature of radiation and matter

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