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.
Consider the nuclear reaction $ X \to Y + Z $. Let $ M_x $, $ M_y $, and $ M_z $ be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

$ (M_x - M_z)<M_y $
$ (M_x - M_y)<M_z $
$ M_x>(M_y + M_z) $
$ M_x<(M_y + M_z) $

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2.
Capacitors are manufactured with certain standard capacitances and working voltages. However, these standard values may not be the ones that are actually needed in a particular application. Two or more capacitors can be grouped in series or in parallel to achieve desired capacitance and voltage. When connected in series, the total capacitance decreases while the voltage rating increases, whereas in parallel connections, the total capacitance increases and maintains the same voltage rating. A capacitor stores energy in the electric field between its plates and stored energy is proportional to the square of the voltage and capacitance $U = \frac{1}{2}CV^2$, where symbols have their usual meanings.
Two capacitors, one of $3 \ \mu$F and the other of $6 \ \mu$F, are connected in series in the circuit as shown in the figure, for a long time. }

3.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

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4.
An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.

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5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

The total charge of the two spheres is conserved.
Both spheres attain the same potential.
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$

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6.
Read the following paragraph and answer the questions that follow.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.

NCERT Solutions For Class 11 Physics Chapter 1 : Physical World

NCERT Solutions for Class 11 Physics Chapter 1

Class 11 Physics Chapter 1 – Important Concepts

CBSE CLASS XII Related Questions

1.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

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NCERT Solutions For Class 11 Physics Chapter 1 : Physical World

NCERT Solutions for Class 11 Physics Chapter 1

Class 11 Physics Chapter 1 – Important Concepts

CBSE CLASS XII Related Questions

1.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

5.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

3.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

5.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?