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.
Write any two features of nuclear forces.
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2.
In a Young's double-slit experiment, two waves each of intensity I superpose each other and produce an interference pattern. Prove that the resultant intensities at maxima and minima are 4I and zero respectively.
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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.
The radius of a nucleus of mass number 125 is:
- 6.0 fm
- 30 fm
- 72 fm
- 150 fm
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5.
A ray of light MN is incident normally on the face corresponding with side AB of a prism with an isosceles right-angled triangular base ABC. Trace the path of the ray as it passes through the prism when the refractive index of the prism material is \( \sqrt{2} \), and \( \sqrt{3} \).
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6.
A part of a wire carrying \( 2.0 \, \text{A} \) current and bent at \( 90^\circ \) at two points is placed in a region of uniform magnetic field \( \vec{B} = -0.50 \, \hat{k} \, \text{T} \), as shown in the figure. Calculate the magnitude of the net force acting on the wire.
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