Class 11 physics chapter 1 important questions with answers for Jee and Neet

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Class 11 physics chapter 1 important questions/ Class 11 Physics Chapter 1 important previous year questions with answers for Jee and Neet:

Class 11 Physics Chapter 1 important pyqs for neet and jee/ Class 11 Physics Chapter 1 important previous year questions with answers for Jee and Neet/ class 11 physics chapter 1 important questions with answers for Jee and Neet

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Chapter 1: Physical World: Normal MCQ:

Q) Which of the following is not a branch of physics?

(a) Mechanics

(b) Optics

(c) Cytogenetics

(d) Electrodynamics

Solution: (c) Cytogenetics

Q) What is the range of the gravitational force?

(a) 10-2 m

(b) 10-15 m

(c) Infinite

(d) 10-10 m

Solution: (c) Infinite

Q) Which of the following statements is not correct?

(a) Physics is the study of nature and natural phenomena.

(b) Physics and technology are not related to each other.

(c) Electrodynamics deals with electric and magnetic phenomena associated with charged and magnetic bodies.

(d) The physical quantities that remain unchanged in a process are called conserved quantities.

Solution: (b) Physics and technology are not related to each other.

Q) Classical physics is applicable to

(a) microscopic world

(b) macroscopic world

(c) both microscopic and macroscopic world

(d) cannot say.

Solution: (b) macroscopic world

Q) Classical physics does not include subjects like

(a) mechanics

(c) heat

(b) light

(d) elementary particles.

Solution: (d) elementary particles.

Q) Physics involves the study of

(a) plants

(b) humans

(c) birds and animals

(d) nature and natural phenomena.

Solution: (d) nature and natural phenomena.

Q) Which of the following statements is correct?

(a) Aeroplane is based on Newton’s laws of motion and steam engine on Bernoulli’s theorem.

(b) Hydroelectric power is based on law of thermodynamics and rocket propulsion on Bernoulli’s theorem.

(c) Computers are based on digital logic of electronic circuits, while electric generator on Faraday’s laws of electromagnetic induction.

(d) Nuclear reactor is based on law of thermo- dynamics and sonar on optical interference.

Solution: (c) Computers are based on digital logic of electronic circuits, while electric generator on Faraday’s laws of electromagnetic induction.

Q) Who was the first to introduce the concept of antiparticle theoretically?

(a) Niels Bohr

(b) Ernest Rutherford

(c) Albert Einstein

(d) Paul Dirac

Solution: (d) Paul Dirac

Q) Which of the following does not depict the correct link between technology and Physics?

(a) Photocell- Photoelectric effect

(b) Rocket propulsion- Laws of thermodynamics

(c) Optical fibres- Total internal reflection of light

(d) Fusion test reactor- Magnetic confinement of plasma

Solution: (b) Rocket propulsion- Laws of thermodynamics

Q) Which year was declared as International Year of Physics?

(a) 2002

(b) 2003

(c) 2005

(d) 2007

Solution: (c) 2005

Q) The range of masses we study in Physics is

(a) 10 ^ – 27 kg to 10 ^ 60 kg

(b) 10 ^ – 27 kg to 10 ^ 55 kg

(c) 10 ^ – 30 kg to 10 ^ 55 kg

(d) 10 ^ – 30 kg to 10 ^ 60 kg

Solution: (c) 10 ^ – 30 kg to 10 ^ 55 kg

Q) Lightning was discovered by

(a) Ohm

(b) Thomson

(c) Franklin

(d) Faraday

Solution: (c) Franklin

Q) Sir C.V. Raman got Nobel Prize in physics for

(a) refraction of light

(b) reflection of light

(c) scattering of light

(d) dispersion of light

Solution: (c) scattering of light

Q) Which of the following statements is correct?

(a) Newton belonged to U.K., who discovered law of gravitation.

(b) Einstein belonged to England, who discovered laws of photoelectric effect.

(c) John Bardeen belonged to France, who discovered transistors.

d) W.K. Roentgen belonged to Holland, who discovered X-rays.

Solution: (a) Newton belonged to U.K., who discovered law of gravitation.

Q) What is full form of GMRT?

(a) Ground Mobile Receive Terminal

(b) Geometric Mean Reciprocal Titer

(c) Giant Metrewave Radio Telescope

(d) General Maintenance and Repair Technician

Solution: (c) Giant Metrewave Radio Telescope

Q) Electron microscope uses which of the following properties of the electrons?

(a) Spin

(b) Wave nature

(c) Negative charge

(d) None of these

Solution: (b) Wave nature

Q) Which of the following statements is incorrect?

(a) Bohr gave theory of hydrogen atom and Yukawa, the theory of nuclear forces.

(b) Law of gravitation was discovered by Newton and principle of inertia by Galileo.

(c) Laws of photoelectric effect were discovered by Einstein and laws of electromagnetic induction by Faraday.

(d) Neutron was discovered by J.J. Thomson and electron was discovered by James Chadwick.

Solution: (d) Neutron was discovered by J.J. Thomson and electron was discovered by James Chadwick.

Q) SONAR emits which of the following waves?

(a) Radio waves

(b) Microwaves

(c) Ultrasonic waves

(d) Gamma rays

Solution: (c) Ultrasonic waves

Q) Who invented the cyclotron?

(a) James Chadwick

(c) Michael Faraday

(b) James Clerk Maxwell

(d) Ernest Orlando Lawrence

Solution: (d) Ernest Orlando Lawrence

Q) In which year did Hahn and Meitner discover the phenomenon of neutron-induced fission of uranium?

(a) 1938

(b) 1950

(c) 1945

(d) 1928

Solution: (a) 1938

Q) Which of the following forces is not fundamental force in nature?

(a) Gravitational force

(b) Electromagnetic force

(c) Strong nuclear force

(d) Tension

Solution: (d) Tension

Q) Arrange the following basic forces in the increasing order of relative strength.

1. Gravitational force

2. Electromagnetic force

3. Weak nuclear force

4. Strong nuclear force

(a) 1, 2, 3, 4

(b) 1, 3, 2, 4

(c) 4, 3, 2, 1

(d) 4, 1, 2, 3

Solution: (b) 1, 3, 2, 4

Q) Generation, propagation and detection of electromagnetic waves is the basis of

(a) lasers

(b) reactors

(c) radio and television

(d) computer

Solution: (c) radio and television

Q) Force of friction and tension in a string are in origin.

(a) Gravitational forces

(b) Electromagnetic forces

(c) Nuclear forces

(d) Weak forces

Solution: (b) Electromagnetic forces

Q) Pick out the correct statements about the strong nuclear force from the following.

S1: It is charge independent.

S2: It is the strongest force in nature.

S3: Its range is very large.

S4: It is responsible for the stability of nuclei.

(a) S1 and S3

(b) S1, S2 and S3

(c) S1, S2 and S4

(d) S2 and S3

Solution: (c) S1, S2 and S4

Q) Inverse square law of distance is followed by

(a) Gravitational forces

(b) Electromagnetic forces

(c) Both (a) and (b)

(d) Neither (a) and nor (b)

Solution: (c) Both (a) and (b)

Q) Which of the following relations is correct?

(a) E = mc

(b) E = m * c ^ 2

(c) E = 2m * c ^ 2

(d) E = m * c ^ 2 / 4

Solution: (b) E = m * c ^ 2

Q) Which of the following statements is not correct regarding conservation laws?

(a) A conservation law is a hypothesis based on observations and experiments.

(b) Conservation laws do not have a deep connection with symmetries of nature.

(c) A conservation law cannot be proved.

(d) Conservation of energy, linear momentum, angular momentum are considered to be fundamental laws of Physics.

Solution: (b) Conservation laws do not have a deep connection with symmetries of nature.

Q) Which of the following physical quantities is not conserved?

(a) Energy

(b) Linear momentum

(c) Force

(d) Mass

Solution: (c) Force

Q) The acceleration due to gravity on the moon is

(a) (1/6) ^ (th) that of the earth

(b) same that of the earth

(c) (1/3) ^ (rd) that of the earth

(d) (1/5) ^ (th) that of the earth.

Solution: (a) (1/6) ^ (th) that of the earth

Chapter 1: Physical World: Assertion Reason:

Instructions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

(a) If both assertion and reason are true and reason is the correct explanation of assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of assertion.

(c) If assertion is true but reason is false.

(d) If both assertion and reason are false.

Q) Assertion: The microscopic domain of physics deals with the constitution and structure of matter at the minute scales of atoms and nuclei.

Reason: Classical physics is adequate to deal with the microscopic domain of physics.

Solution: (c)

Q) Assertion: The elastic spring force arises due to the net attraction or repulsion between the neighbouring atoms of the spring when it is elongated or compressed.

Reason: The laws of derived forces such as spring force, friction force are independent of the laws of fundamental forces in nature.

Solution: (c)

Q) Assertion: Electrons do not experience strong nuclear force.

Reason: Strong nuclear force is charge-independent force.

Solution: (b)

Q) Assertion : The basic laws of electromagnetism govern all electric and magnetic phenomena.

Reason: The attempts to unify fundamental forces of nature reflect the quest for unification.

Solution: (b)

Q) Assertion: A stone and a feather dropped from the same height do not reach the ground at the same time.

Reason: Acceleration due to gravity is dependent on the mass of the object.

Solution: (c)

Q) Assertion: In physics, we attempt to derive the properties of a bigger, more complex system from the properties and interactions of its constituent simpler parts.

Reason: This approach is called unification and is at the heart of physics.

Solution: (c)

Q) Assertion: If we perform an experiment in our laboratory today and repeat the same experiment on the same objects under identical conditions after a year, the results are found to be the same.

Reason: The laws of nature do not change with time.

Solution: (a)

Q) Assertion: The acceleration due to gravity on the moon is one-sixth that on the earth.

Reason: The law of gravitation is the same on both the moon and the earth.

Solution: (b)

Q) Assertion: Gravitational force is always attractive in nature, while electromagnetic force can be attractive or repulsive.

Reason: Electromagnetic force dominates terrestrial phenomena.

Solution: (c)

Q) Assertion : In a nuclear process, mass gets converted into energy.

Reason: According to Einstein’s mass energy equivalence relation, mass m is equivalent to energy E, given by the relation E = mc² where c is the speed of light in vacuum.

Solution: (a)

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