NCERT Solutions for Class 11 Physics Chapter 1 Physical World all question answers updated for new academic session 2022-2023. Get here multiple choice questions and extra question answers along with class 11 Physics chapter 1 solutions.

Class 11 Physics Chapter 1 MCQ

Q1

Atomic and Molecular phenomena are given out by

[A]. Fluid mechanics
[B]. Applied mechanics
[C]. Quantum mechanics
[D]. Newtonian Mechanics
Q2

Physics is a

[A]. Applied Science
[B]. Mathematical Science
[C]. Engineering Science
[D]. Natural Science
Q3

Which one of the most possible step applying in the scientific method?

[A]. Analysis of test results
[B]. Formulation of a Question
[C]. Formulating of a hypothesis theory
[D]. Building a theory
Q4

Which is the universal force exists in between two mutual attraction objects or by the virtue of their masses?

[A]. Weak Nuclear Force
[B]. Strong Nuclear Force
[C]. Gravitational Force
[D]. Electromagnetic Force

Gravitational Force

It is the attraction between any two objects in the universe. This force is proportional to the product of the masses of the interacting objects and inversely proportional to the square of the distance between them. This is Newton’s law of universal gravitation. In the case of a light body, the gravitational force is very weak. But in the case of massive objects, the gravitational force is considerable. For example, the root cause of planets orbiting the sun, star formation, and galaxy formation is gravity. In fact, the structure and evolution of the entire universe is governed by gravity.

Electrostatic Force

The force between two electrostatic charges is called electrostatic force. According to Coulomb’s electrostatic law, the electrostatic force is proportional to the product of the charges and inversely proportional to the square of the distance between them. When the glass rod is rubbed with a silk cloth, the glass rod becomes positively charged. Similarly, when rubbed with fur, the rubber rod becomes negatively charged. Among elementary particles, protons are positively charged, while electrons are negatively charged. The electrostatic force is attractive between charges of opposite and repulsive between charges of the same nature.

Class 11 Physics Chapter 1 Multiple Choice Questions
Q5

What is the first step in applying scientific method?

[A]. Performing test
[B]. Developing theory
[C]. Formulating of a Question
[D]. Formulating a hypothesis
Q6

Which one of the following is the invention of J.C. Bose?

[A]. Cosmic radiation
[B]. Wavelength theory of light
[C]. Electron
[D]. Ultra short radio waves
Q7

State true or false: A scientific theory cannot be revised to fit new phenomena or data

[A]. True
[B]. False
Q8

Beta-decay is an example of

[A]. Weak Nuclear Force
[B]. Strong Nuclear Force
[C]. Gravitational Force
[D]. Electromagnetic Force
Magnetic Force

The magnetism of magnets has been known since antiquity. Likewise, the use of magnetic compasses has been popular for a long time. Its needle is a small magnet, subject to the action of the Earth’s magnetic field. This is an example of the action of magnetism. There are four laws of force between two magnets, or the laws of force on a magnet placed in a magnetic field are known. Therefore, these forces can be easily calculated.

Electromagnetic force

Although we refer to electricity and magnetism and their effects as separate phenomena, they are closely related. For example, a charge moving in a magnetic field experiences a force. It is also the electric charge in motion that produces the magnetic field. Therefore, we say electromagnetism – the combination of electricity and magnetism. Electricity and magnetism are considered two aspects of the general electromagnetic force.

What is the significance of chapter 1 Physical World in Class 11 Physics?

The first chapter of the Grade 11 Physics curriculum is Physical World. This chapter covers topics such as the fundamental laws and principles of science, natural science, mathematics, and physics. It focuses on the impact, power and usefulness of these themes. Students will gain an in-depth understanding of the development of various laws of physics. All of these topics are important for grasping the basic concepts in 11th class foundation.

Is class 11 physics chapter 1 the physical world important for competitive exams?

Regarding NEET, the Physical World chapter is not as important as the other chapters. It was observed that not more than one or two questions were asked in this chapter of the previous year’s exam paper. The syllabus for NEET has been reduced, so there are fewer opportunities for questions in this chapter. However, students should not avoid learning it entirely. Class 11 Physics chapter 1 contains very important definitions and facts.

How the concept of Physical Units can be covered in class 11 Physics chapter 1?

Physical unit is one of the most important concepts in Physics Chapter 1 of grade 11. The next chapter deals with units and measurements. Physical units refer to various standard units used to measure physical quantities. For example, kilograms, grams, and liters are all physical units used to measure the physical quantities of various solid or liquid elements. These are the topics which are used throughout in class 11 physics. Teach the concept of physical units to introduce the measurement and comparison of any physical quantity.