NCERT Solutions For Class 11 Physics Chapter 1 : Physical World

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NCERT Solutions for Class 11 Physics Chapter 1 Physical World deals with the matters and the materials around the world, where the laws of physics are being applied in nature. The Physical world around us is full of different complex natural phenomena. These are based on some basic physical laws that govern their working in nature.

The chapter has been omitted from the CBSE Class 11 Physics Syllabus 2022-2023. Class 11 Physics Chapter 1 deals with the scope of physics and technology in society, gravitational force, electromagnetic force, and strong and weak nuclear force. It also covers the nature of physical laws.

Download PDF: NCERT Solutions for Class 11 Physics Chapter 1

NCERT Solutions for Class 11 Physics Chapter 1

Class 11 Physics Chapter 1 – Important Concepts

Physics is a fundamental science that is concerned with understanding the natural phenomena that occur in the universe.

The various branches of Physics include – Mechanics, Thermodynamics, Electromagnetism, and Modem Physics.

The scope of Physics covers a magnitude of physical quantities such as mass, length, time, energy, and so on.

Physics deals with the macroscopic world such as the universe and galaxies as well as the microscopic world such as the nucleus of an atom.

Gravitational force is the force of attraction between any 2 bodies that is directly proportional to the product of their masses. It is inversely proportional to the square of the distance between them.

\(\begin{array}{l}F\propto \frac{(m_{1}m_{2})}{r^{2}}\end{array}\)

Electromagnetic Force is a physical interaction occurring between electrically charged particles.

Electromagnetic Force can be either attractive or repulsive.

Nuclear force is a force that acts between the neutrons and protons of atoms.

The nuclear force is the force that binds the nucleus together.

Class 11 Physics Related Topics:

Difference between discovery and invention	Equivalence Principle	Scientific Investigation
Statistical Mechanics	Hubble’s Law	Units of measurement
Systems of units	Length, mass and time measurements	Accuracy and precision of measuring instruments

Physics Study Guides:

Physics Study Material	Physics Formula	Comparison articles in Physics
Derivations in Physics	Physics Study Material	Physics Constants

CBSE CLASS XII Related Questions

1.
Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.
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2.
Two thin lenses of focal length \( f_1 \) and \( f_2 \) are placed in contact with each other coaxially. Prove that the focal length \( f \) of the combination is given by \[ f = \frac{f_1 f_2}{f_1 + f_2}. \]
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3.
Suppose a pure Si crystal has \( 5 \times 10^{28} \) atoms per \( \text{m}^3 \). It is doped with \( 5 \times 10^{22} \) atoms per \( \text{m}^3 \) of Arsenic. Calculate majority and minority carrier concentration in the doped silicon. (Given: \( n_i = 1.5 \times 10^{16} \, \text{m}^{-3} \))
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4.
Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a material of dielectric constant 4. Calculate the capacitances of X and Y, if the equivalent capacitance of the combination of X and Y is \( 4 \, \mu\text{F} \). Calculate the potential difference across the plates of X and Y.
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5.
Write any two features of nuclear forces.
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6.
Draw a circuit diagram of a full-wave rectifier using p-n junction diodes. Explain its working and show the input-output waveforms.
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