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### NCERT Solutions For Class 12 Physics

NCERT books form an appropriate platform in every concept for the exams conducted by CBSE and class 12 is an exact turning point in every student’s career. It involves all the important topics and specific explanation that helps in better understanding of the students and teachers. NCERT books also have a major role in JEE preparation says HRD ministry.

Byju’s comes up with NCERT physics class 12 solutions pdf along with appropriate explanations. It is designed by top-rated teachers. The set of solutions for class 12 Physics us encompassed with step-by-step explanations to all the questions of NCERT text book. It serves a major role in exam preparation along with home assignments.

#### Chapter 3: Current Electricity

Question 3.1: The car has a storage battery with an emf of 12 V. 0.4Ω is the internal resistance of ...

#### Chapter 10: Wave Optics

Question 1: Monochromatic light having a wavelength of 589nm from the air is incident on a water surface. Find the ...

#### Chapter 9: Ray Optics and Optical Instruments

Question 1: A candle which is 2.5 cm in height is placed 27 cm in front of a concave mirror ...

#### Chapter 13: Nuclei

Q 13.1 (a) Lithium has two stable isotopes _{3}^{6}\textrm{Li} and _{3}^{7}\textrm{Li} have respective abundances of 7.5% and 92.5%. These isotopes ...

#### Chapter 14: Semiconductor Electronics: Materials, Devices and Simple Circuits

Q 1. Find which of the given statement is true for an n – type silicon. (a) Majority carriers are ...

## Chapter 3: Current Electricity

Question 3.1: The car has a storage battery with an emf of 12 V. 0.4Ω is the internal resistance of the battery, what is the maximum current that can be drawn from the battery? Answer 3.1: Given that Emf of the battery, E = 12 V Battery has an Internal resistance of R = 0.4 […]

## Chapter 10: Wave Optics

Question 1: Monochromatic light having a wavelength of 589nm from the air is incident on a water surface. Find the frequency, wavelength and speed of (i) reflected and (ii) refracted light? [1.33 is the Refractive index of water] Answer: Monochromatic light incident having wavelength, = 589 nm = 589 x 10-9 m Speed of light […]

## Chapter 9: Ray Optics and Optical Ins...

Question 1: A candle which is 2.5 cm in height is placed 27 cm in front of a concave mirror having radius of curvature 36 cm. Find the distance from the mirror at which the screen should be placed to obtain a sharp image? Detail the size and nature of the image. By how much […]

## Chapter 13: Nuclei

Q 13.1 (a) Lithium has two stable isotopes and have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium. (b) Two stable isotopes of Boron , and . Their respective masses are 10.01294 u and 11.00931 u, and the atomic mass of […]

## Chapter 14: Semiconductor Electronics...

Q 1. Find which of the given statement is true for an n – type silicon. (a) Majority carriers are the electrons and dopants are the trivalent. (b) Minority carriers are the electrons and dopants are the pentavalents. (c) Minority carriers are the holes and dopants are the pentavalent. (d) Majority carriers are the holes […]

## Chapter 12: Atom

Q1: Pick an appropriate option to justify the given statement: (a)  Size of an atom in Rutherford’s model is _________ the size of an atom compared to of Thomson’s model. (Less than, Greater than, no different than) (b) Even in the case of stable equilibrium _________ electrons experience a net force, though _______ electrons do […]

## Chapter 11: Dual Nature of Radiation ...

Q.11.1: Find the: (a) Maximum frequency, and (b) The minimum wavelength of X-rays produced by 30 kV electrons.  Ans: Electron potential, V = 30 kV = 3 × 104 V Hence, electron energy, E = 3 × 104 eV Where, e = Charge on one electron = 1.6 × 10-19 C (a) Maximum frequency by […]

## Chapter 7: Alternating Current

Question 7.1 : A resistor of 100 Ω is being connected to a supply of 220 V, 50 Hz (a) Calculate the rms value of current in the connection (b) Calculate the total power being consumed over an entire cycle Answer 7.1 : Given : Given that, Resistance R = 100 Ω Source voltage , […]

## Chapter 8: Electromagnetic Waves

Q 8.1) Two circular plates having radius of 12 cm each and separated by 5 cm are used to make a capacitor as shown in the Figure 8.6. An external source charges this capacitor. 0.15 A is the charging current which remains constant. (a) Determine the capacitance and the rate of charge of potential difference […]

## Chapter 6: Electromagnetic Induction

Q 1. From the given figure determine the direction of the current induced in the different given situations. (i) (ii) (iii) (iv)     (v)    (vi) Answer: Lenz’s law shows the direction of induced current in a closed loop. In the given two figures they shows the direction of induced current when the North pole […]