CBSE Class 11 Physics All Chapters Frequently Asked Questions

 PHYSICAL WORLD

NAME OF THE CHAPTER : PHYSICAL WORLD

NAME OF THE TOPIC : FUNDAMENTAL FORCES

Q.NO.1 Name the force which is independent from the laws of fundamental forces in nature.

2. Which force plays the key role in the large scale phenomena of the universe?

3. Out of strong nuclear force and weak nuclear force which exist during Beta-decay?

4. Write the scientific principle in the following technologies?

i) Computer ii). Rocket propulsion

5. What is the range of weak nuclear force in the nuclei?

ANSWERS

1. Spring force and Frictional force.

2. Gravitational force

3. Weak nuclear force

4 i)Digital logic

ii)Newtons’ law of motion

5 In the order of 10^-6m

NAME OF THE CHAPTER : PHYSICAL WORLD

NAME OF THE TOPIC : FUNDAMENTAL FORCES

Q.NO.1 Write the Einstein mass- energy relation.

2. What is the major contribution of DrHomi Jahangir Bhaba In physics?

3. Write one phenomenon (at least one) that occurs in microscopic domain in classical physics.

4. Name two instruments that involve light in their functioning;

5. Write at least two properties of gravitational force. 

ANSWERS:

1. E = mc²

2. To cascade the process of cosmic radiation

3. Atomic ,molecular, nuclear phenomena

4. Telescope and microscope

5. Long range force, always attractive in nature

NAME OF THE CHAPTER : PHYSICAL WORLD

NAME OF THE TOPIC : FUNDAMENTAL FORCES

Q.NO.1 Write the properties of nuclear force.

2. Write the strongest force in nature.

3. How the name of E.M. force arises in nature?

4. Name the physicist who unified the different forces and different domains in nature

5. What is the basic difference between chemical reaction and nuclear reaction?

ANSWERS:

1. Short range and non central force.

2. Strong nuclear force.

3. When the charges are in motion it produces both electric and magnetic field which are inseparable, hence the name arise.

4. Oersted and Maxwell

5. In chemical reaction atoms rearrange themselves in the formation of molecules whereas in nuclear reaction mass is converted into energy.