CBSE Class 12 Sample Papers for Physics

Class 12 Physics Marks Distribution
Units	Marks
Electrostatics	16
Current Electricity
Magnetic Effects of Current and Magnetism	17
Electromagnetic Induction and Alternating Currents
Electromagnetic Waves	18
Optics
Dual Nature of Radiation and Matter	12
Atoms and Nuclei
Electronic Devices	7
Total	70

CBSE Class 12 Physics Syllabus Term Wise

Term - I

Unit I: Electrostatics

Chapter–1: Electric Charges and Fields

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

Chapter–2: Electrostatic Potential and Capacitance

Electric potential, potential difference, electric potential due to a point charge, a dipole and system of charges; equipotential surfaces, electrical potential energy of a system of two-point charges and of electric dipole in an electrostatic field. Conductors and insulators, free charges and bound charges inside a conductor. Dielectrics and electric polarisation, capacitors and capacitance, combination of capacitors in series and in parallel, capacitance of a parallel plate capacitor with and without dielectric medium between the plates, energy stored in a capacitor.

Unit II: Current Electricity

Chapter–3: Current Electricity

Electric current, flow of electric charges in a metallic conductor, drift velocity, mobility and their relation with electric current; Ohm's law, electrical resistance, V-I characteristics (linear and nonlinear), electrical energy and power, electrical resistivity and conductivity; temperature dependence of resistance. Internal resistance of a cell, potential difference and emf of a cell, combination of cells in series and in parallel, Kirchhoff's laws and simple applications, Wheatstone bridge, metre bridge(qualitative ideas only). Potentiometer - principle and its applications to measure potential difference and for comparing EMF of two cells; measurement of internal resistance of a cell (qualitative ideas only)

Unit III: Magnetic Effects of Current and Magnetism

Chapter–4: Moving Charges and Magnetism

Concept of magnetic field, Oersted's experiment. Biot - Savart law and its application to current carrying circular loop. Ampere's law and its applications to infinitely long straight wire. Straight and toroidal solenoids (only qualitative treatment), force on a moving charge in uniform magnetic and

electric fields. Force on a current-carrying conductor in a uniform magnetic field, force between two parallel current-carrying conductors-definition of ampere, torque experienced by a current loop in uniform magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter.

Chapter–5: Magnetism and Matter

Current loop as a magnetic dipole and its magnetic dipole moment, magnetic dipole moment of a revolving electron, bar magnet as an equivalent solenoid, magnetic field lines; earth's magnetic field and magnetic elements.

Unit IV: Electromagnetic Induction and Alternating Currents

Chapter–6: Electromagnetic Induction

Electromagnetic induction; Faraday's laws, induced EMF and current; Lenz's Law, Eddy currents. Self and mutual induction.

Chapter–7: Alternating Current

Alternating currents, peak and RMS value of alternating current/voltage; reactance and impedance; LC oscillations (qualitative treatment only), LCR series circuit, resonance; power in AC circuits. AC generator and transformer.

Term II

Unit V: Electromagnetic waves

Chapter–8: Electromagnetic Waves

Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only). Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.

Unit VI: Optics

Chapter–9: Ray Optics and Optical Instruments

Ray Optics: Refraction of light, total internal reflection and its applications, optical fibers, refraction at spherical surfaces, lenses, thin lens formula, lensmaker's formula, magnification, power of a lens, combination of thin lenses in contact, refraction of light through a prism.

Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.

Chapter–10: Wave Optics

Wave optics: Wave front and Huygen's principle, reflection and refraction of plane wave at a plane surface using wave fronts. Proof of laws of reflection and refraction using Huygen's principle. Interference, Young's double slit experiment and expression for fringe width, coherent sources and sustained interference of light, diffraction due to a single slit, width of central maximum

Unit VII: Dual Nature of Radiation and Matter

Chapter–11: Dual Nature of Radiation and Matter

Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations; Einstein's photoelectric equation-particle nature of light.

Experimental study of photoelectric effect Matter waves-wave nature of particles, de-Broglie relation

Unit VIII: Atoms and Nuclei

Chapter–12: Atoms

Alpha-particle scattering experiment; Rutherford's model of atom; Bohr model, energy levels, hydrogen spectrum.

Chapter–13: Nuclei

Composition and size of nucleus Nuclear force Mass-energy relation, mass defect, nuclear fission, nuclear fusion.

Unit IX: Electronic Devices

Chapter–14: Semiconductor Electronics:

Materials, Devices and Simple Circuits Energy bands in conductors, semiconductors and insulators (qualitative ideas only) Semiconductor diode - I-V characteristics in forward and reverse bias, diode as a rectifier; Special purpose p-n junction diodes: LED, photodiode, solar cell.

Experiments assigned for Term I

1. To determine resistivity of two / three wires by plotting a graph between potential difference versus current.
2. To find resistance of a given wire / standard resistor using metre bridge.
   OR
   To verify the laws of combination (series) of resistances using a metre bridge.
   OR
   To verify the laws of combination (parallel) of resistances using a metre bridge.
3. To compare the EMF of two given primary cells using potentiometer
   OR
   To determine the internal resistance of given primary cell using potentiometer.
4. To determine resistance of a galvanometer by half-deflection method and to find its figure of merit.
5. To convert the given galvanometer (of known resistance and figure of merit) into a voltmeter of desired range and to verify the same.
   OR
   To convert the given galvanometer (of known resistance and figure of merit) into an ammeter of desired range and to verify the same.
6. To find the frequency of AC mains with a sonometer.

Experiments assigned for Term-II

1. To find the focal length of a convex lens by plotting graphs between u and v or between 1/u and1/v.
2. To find the focal length of a convex mirror, using a convex lens.
   OR
   To find the focal length of a concave lens, using a convex lens.
3. To determine angle of minimum deviation for a given prism by plotting a graph between angle of incidence and angle of deviation.
4. To determine refractive index of a glass slab using a travelling microscope.
5. To find refractive index of a liquid by using convex lens and plane mirror.
6. To draw the I-V characteristic curve for a p-n junction diode in forward bias and reverse bias.

Structure of CBSE Physics Sample Paper for Class 12 Science is

For Preparation of board exams students can also check out other resource material

CBSE Class 12 Physics Question Papers

Important Questions for Class 12 Physics Chapter Wise

Physics Revision Notes for class 12

Previous Year Question Paper CBSE Class 12 Physics

What are CBSE Sample Papers?

Sample papers are mainly a kind of mock tests or model test papers which are prepared in accordance with the latest syllabus and guidelines that are issued by the central board. These examination test papers are designed as the replica of the actual papers that are asked in final examinations. All the marking schemes , number of questions , types of questions asked are followed as per board scheme and are issued to students two or three months before the examinations so that students get enough time to practice.

What is the importance of Sample Papers for Students?

In order to access the level of preparation done by any particular student he or she needs to solve CBSE Sample Papers. These papers are the perfect way to practise for the final board exam. If one wants to have a clear idea of how the final exam papers would be in terms of level of difficulty, time and other aspects then , all students must make sure that they do sample papers once their course revision is finished.

Few benefits of solving CBSE sample papers are given below:

• Gauging Self Performance: Understanding and revising the subject is very good, but unless one attempts the sample paper in the lookalike environment as in board exam, seldom can the student identify and check whether the understanding of all concepts of the subject are complete or not. Once students try the question paper in the same time frame he or she is able to judge the capability of solving the paper in the stipulated time frame. It highlights the weak areas if any and gives students ample amount of time to work on those areas and be better prepared before exams.
• Testing Time Criticality: Knowing is not everything as far as board papers are concerned. Sometimes it happens that in spite of knowing everything a student falls short of time to complete the entire paper and thus loses marks. Generally CBSE sample papers are generally of 3 hour duration. So while practicing sample papers it is imperative to create a board like environment at home and ensure that sample paper is attempted only in 3 hours and then check whether it was possible to complete the paper in the desired amount of time. Often at first students take longer than expected, and thus they get early warning to practice more and increase the speed.
• Exam Anxiety: Sometimes sensitive students feel anxious to sit in the examination hall with a 3 hour length paper and for them it becomes a more intense requirement to practice prior to main exams and get rid of any kind of fear. Since they do not know what questions will be asked in the CBSE board they create panic in their mind due to this fear of the unknown and get scared with the idea that they might not be able to do well in exams. Thus such students needs to complete at-least 7-10 sample papers prior to the exams, to gain confidence and get into better frame of mind.

Best Time to Practice Sample Papers

This mainly varies from student to student but in general students should start dealing with sample papers as soon as their book revisions are over. Infact along with sample papers students should also look for model test papers of various publishers and attempt them to get the idea of level of preparation. As the dates of exam are approaching near by that time only samples papers should be mainly considered for practice and in case of any shortcomings those should be thoroughly discussed with teachers freids and other concerned person so that one has clarity before attempting the final paper.