Welcome to the NCERT Solutions for Class 12 Physics. This page offers chapter-wise solutions designed to help students grasp key concepts easily. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
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Chapter 1 Electric Charges and Field
In the first chapter, you will study about the electric charges, fields, and areas in which they are functional. In fact, Physics NCERT Class 12 covers almost all the electric charges types that have been found till now. Also, study the detailed discussion about the transference of electrons along an electric field, electric charges additivity, conservation, quantization, theorems and laws associated with electric charges and electric fields, Gauss; Law, etc. At the end of the lesson answer the questions from the chapter to understand how well you have understood the topic.
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Chapter 2 Electrostatic Potential and Capacitance
The second chapter of Class 12 Physics introduces you to Electrostatic Potential and Capacitance. Different electric fields possess varying electrostatic potential. This chapter informs you about the electric potential and its applications, potential difference, equipotential surfaces, the electrical potential energy of charges in an electrostatic field, etc. This chapter is comprised of a number of formulae and terms associated with the electrostatic potential. There are questions related to this topic at the end of the chapter for you to work out.
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Chapter 3 Current Electricity
In the third chapter in NCERT Class 12 Physics, you will study about Current Electricity. The third chapter of Class 12 Physics consists of 15 different topics, all of which you need to study well. The chapter teaches you about the concept of electric current, the flow of electric charges in a liquid and metallic conductor. The concept of electrical resistance, V-I characteristics, The Kirchhoff’s law and its applications, Ohm’s Law, potentiometer – principle and its applications, Wheatstone bridge, and meter bridge topics. Saralstudy provides the solution of Physics Class 12 with solved questions and explained formulae to assist you in understanding the chapter.
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Chapter 4 Moving Charges and Magnetism
In the fourth chapter of Physics NCERT Class 12, you will study about the Moving Charges and Magnetism. This chapter consists of 11 different topics. In this chapter, you will learn about the magnetic force, knowledge about motion along with a magnetic field, the Biot-Savart’s Law, Ampere’s Circuital Law, Solenoid and Toroid motion, the relationship among µ0, ɛ0 and c, the concept of torque, moving coil galvanometer etc.
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Chapter 5 Magnetism and Matter
Magnetism and Matter is the fifth chapter of class 12th Physics. It consists of seven topics in total. This chapter explains you about the terms like the magnetism of earth and the property of magnetism present in various materials. You also get to learn about Magnetism and Gauss’ Law in more detail, Electrostatic Analogue, the concept of torque on a magnetic dipole; bar magnet as an equivalent solenoid, magnetic field lines, etc. SaralStudy provides you with the detailed information on all the topics so that you will not have any queries left unanswered after finishing this chapter on this site.
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Chapter 6 Electromagnetic Induction
In the sixth chapter of Physics NCERT Class 12, you get to learn about electromagnetic induction. This chapter contains a bit of the previous chapter’s information about magnetism and matter too. The chapter comprises ten topics in total, and teach you about the concept of magnetic induction, magnetic flux, inductance, eddy currents and a lot more. You will also get to learn about Faraday’s Law of electromagnetic induction, Fleming’s Right Hand Rule, and Lenz’s Law in this chapter.
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Chapter 7 Alternating Current
The seventh chapter of NCERT class 12 Physics has only nine topics in all. You get detailed knowledge and understanding about alternating currents and its application in resistor, LCR series circuit, peak and RMS value of alternating voltage, reactance, impedance, LC oscillations, resonance and power in AC circuits, AC generator and transformer, watt-less current, etc. At the end of the chapter, you will find exercises for you to solve.
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Chapter 8 Electromagnetic Waves
This eighth chapter in Class 12 Physics is inclusive of three different topics. All of these three topics; displacement current, electromagnetic waves, and the electromagnetic spectrum are interrelated and based on the common concept of magnetism. The chapter comprises the different electromagnetic waves which include microwaves, x-rays, radio waves and also their usage in practical life, Maxwell’s Equation, the frequency of the different electromagnetic waves and their wavelengths, etc.
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Chapter 9 Ray Optics And Optical Instruments
You will get to learn about the optical instruments in use, spherical mirrors, and their activities in reflecting as well as refracting light, mirror formula, optical fibres, thin lens formula, etc in the ninth chapter of Class 12 Physics. This chapter also teaches you about microscopes and astronomical telescopes and their magnifying powers.
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Chapter 10 Wave Optics
Moving ahead from ray optics, the tenth chapter in Physics Class 12 consists of the knowledge of wave optics and its properties. Here you will learn about the Huygens Principle and its different applications in refraction and reflection of plane waves, Polarisation and interference of light waves, Young’s experiment and the applications of wave optics, Brewster’s law, the concept of resolving power, etc.
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Chapter 11 Dual Nature Of Radiation And Matter
The eleventh chapter in the Class 12 Physics NCERT book, you study about the nature of radiation and the properties. This chapter also teaches you about the photoelectric effects of light, dual nature of radiation, photoelectric equation of Einstein, the Wave Theory, Wave Nature of matters around us, Energy quantum of radiation, etc. Saralstudy provides you with the detailed reference solutions ready for you for understanding the chapters completely.
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Chapter 12 Atoms
The twelfth chapter reaches the detailed discussion about atoms, and explains about alpha-particle, Rutherford’s model of an atom, Bohr model, energy levels, hydrogen spectrum. This chapter consists of six topics. Studying this chapter makes you understand the most basic structure of our surrounding.
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Chapter 13 Nuclei
The thirteenth chapter of NCERT Physics for Class 12 teaches about the nuclei. This chapter explains about the nucleus of an atom and energy, kits size, force, atomic masses, radioactivity, radioactive particles and their properties, and radioactive decay law, isotopes, isobars, isotones, the mass-energy relation, nuclear fission, fusion, the radioactivity properties, etc.
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Chapter 14 Semiconductor Electronics
This fourteenth and second last chapter has eleven topics and makes you aware of the differentiation between extrinsic and intrinsic semiconductors, energy bands and their I-V characteristics, diodes, and types of diodes and their characteristics and uses of diodes, junction transistor and characteristics of a transistor and application. Here you also get knowledge about the concept of analog and digital signals, logic gates. Solving the question at the end of the chapter will tell you how well you have learned them with NCERT Solutions for Class 12 Physics.
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Chapter 15 Communication Systems Physics
The last chapter of the book of NCERT Physics Class 12, tell you about the communication systems and this chapter comprises of ten topics. Communication System tells you about the three basic elements of a communication system, bandwidth of signals and transmission medium, concept of wave propagation, satellite communication, propagation of electromagnetic waves, amplitude modulation. There is an exercise at the end of this chapter for the final check of your progress. With the help of Saralstudy, you can the easy learning and more accurate solutions of NCERT Physics Class 12.
Popular Questions of Class 12 Physics
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What is the force between two small charged spheres having charges of 2 x 10-7 C and 3 x 10-7 C placed 30 cm apart in air?
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An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear charge density.
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A polythene piece rubbed with wool is found to have a negative charge of 3 × 10−7 C.
(a) Estimate the number of electrons transferred (from which to which?)
(b) Is there a transfer of mass from wool to polythene?
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A 600 pF capacitor is charged by a 200 V supply. It is then disconnected from the supply and is connected to another uncharged 600 pF capacitor. How much electrostatic energy is lost in the process?
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A parallel plate capacitor with air between the plates has a capacitance of 8 pF (1pF = 10-12 F). What will be the capacitance if the distance between the plates is reduced by half, and the space between them is filled with a substance of dielectric constant 6?
- Q:- A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?
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A regular hexagon of side 10 cm has a charge 5 µC at each of its vertices. Calculate the potential at the centre of the hexagon.
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A point charge +10 μC is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in Fig. 1.34. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm.)
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A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward, what is the net charge on the sphere?
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A point charge of 2.0 μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
Recently Viewed Questions of Class 12 Physics
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Determine the current in each branch of the network shown in figure
- Q:-
An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear charge density.
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In a certain region of space, electric field is along the z-direction throughout. The magnitude of electric field is, however, not constant but increases uniformly along the positive z-direction, at the rate of 105 NC-1 per metre. What are the force and torque experienced by a system having a total dipole moment equal to 10-7 Cm in the negative z-direction?
- Q:- Two charges 2 μC and −2 μC are placed at points A and B 6 cm apart.
(a) Identify an equipotential surface of the system.
(b) What is the direction of the electric field at every point on this surface? - Q:-
A parallel plate capacitor is to be designed with a voltage rating 1 kV, using a material of dielectric constant 3 and dielectric strength about 107 Vm-1. (Dielectric strength is the maximum electric field a material can tolerate without breakdown, i.e., without starting to conduct electricity through partial ionisation.) For safety, we should like the field never to exceed, say 10% of the dielectric strength. What minimum area of the plates is required to have a capacitance of 50 pF?
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Figure shows a 2.0 V potentiometer used for the determination of internal resistance of a 1.5 V cell. The balance point of the cell in open circuit is 76.3 cm. When a resistor of 9.5 Ω is used in the external circuit of the cell, the balance point shifts to 64.8 cm length of the potentiometer wire. Determine the internal resistance of the cell.
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Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.0 × 10−22 C/m2. What is E:
(a) in the outer region of the first plate,
(b) in the outer region of the second plate, and
(c) between the plates?
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A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 x 10-7 m2, and its resistance is measured to be 5.0 Ω. What is the resistivity of the material at the temperature of the experiment?
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A p-n photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Can it detect a wavelength of 6000 nm?
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(a) Alloys of metals usually have (greater/less) resistivity than that of their constituent metals.
(b) Alloys usually have much (lower/higher) temperature coefficients of resistance than pure metals.
(c) The resistivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature.
(d) The resistivity of a typical insulator (e.g., amber) is greater than that of a metal by a factor of the order of (1022/103).