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Scope and progress of physics - class-XI

Description: scope and progress of physics
Number of Questions: 21
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Tags: science in daily life nature of the physical world and measurement bharat and science physics physical world and measurement physical world
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Classical physics is applicable to the

  1. microscopic world

  2. macroscopic world

  3. both microscopic and macroscopic world

  4. cannot say


Correct Option: B
Explanation:

Classical physics is applicable to macroscopic world.

Which of the following statements is not correct. ?

  1. Physics is the study of nature and natural phenomena.

  2. Physics and technology are not related to each other.

  3. Electrodynamics deals with electric and magnetic phenomena associated with charged and magnetic bodies.

  4. The physical quantities that remain unchanged in a process are called conserved quantities.


Correct Option: B
Explanation:

Complex technologies are making use of more rarefied physical concepts. Physics describes the things that are possible in the universe, and technology is eventually built to do work within that which has been discovered by physics. This interplay also works in reverse. Modern physicists are frequently making use of extremely high-tech machines and processes. For example, the Large Hadron Collider in Switzerland is the world's largest particle accelerator. It can be operated at higher energies than any previous one. It was built explicitly to perform experiments in particle physics.

Thus Physics and technology are very much related to each other. So statement B is not appropriate. Although the other three statements are very much correct and factful.

Thus option B is correct.

What is the two principal thrust in Physics?

  1. Unification and Reduction

  2. Unification and Oxidation

  3. Magnification and Reduction

  4. Simplification and Reduction


Correct Option: A
Explanation:

The principal thrust in physics is to unity all the fundamental forces into a single framework and reduce the no.of different theories to minimal no. of models which can describe a great number of a phenomenon. (a)

where Unification is the act of unifying the different laws valid for different phenomena into a single theory that explains all the different phenomena.

The reduction is breaking down of a complex system into simple constituent systems to so that laws of physics can be applied to these systems and we can understand the working of the complex system.

The approach to derive the properties of a bigger, more complex, system from the properties and interactions of its constituent simpler parts is called ____________.

  1. Reduction

  2. Simplification

  3. Unification

  4. Modification


Correct Option: A
Explanation:

The reduction is breaking down of a complex system into simple constituent systems to so that laws of physics can be applied to these systems and we can understand the working of the complex system.

Which of the following scientific phenomenon is involved in the generation of Hydroelectric power?

  1. Motion of charged particles in electromagnetic fields

  2. Conversion of gravitational potential energy into electrical energy

  3. Bernoullis principle in fluid dynamics

  4. Trapping and cooling of atoms by laser beams and magnetic fields.


Correct Option: B
Explanation:

In dams,the gravitational potential energy of water is used to turn the turbines which generate electrical energy.

Which of the following does not comes under microscopic forces?

  1. Normal force

  2. Tension force

  3. Frictional force

  4. All of these


Correct Option: D
Explanation:

Normal force,tension force and Frictional force,all are macroscopic forces.

The electric generator is based on which scientific principle?

  1. Reflection of ultrasonic waves

  2. Superconductivity

  3. Faradays laws of electromagnetic induction

  4. Magnetic confinement of plasma


Correct Option: C
Explanation:

Electric generator was faradays law of electromagnetic induction,a changing magnetic flux gives rise to electric current.

Which of the following phenomena does not come under macroscopic domain?

  1. Phenomena at laboratory scales

  2. Phenomena at terrestrial scales

  3. Molecular and nuclear phenomena

  4. Phenomena at astronomical scales


Correct Option: C
Explanation:

Molecular and nuclear phenomenon come under microscopic domain.

Bullet trains are example of invention related to which fields ?

  1. Medicine

  2. Transportation

  3. Education

  4. None of these


Correct Option: B

Heliocentric theory was proposed by ................

  1. Copernicus

  2. Ptolemy

  3. Newton

  4. Tychobrahe


Correct Option: A
Explanation:

Heliocentric theory is an astronomical model which was proposed by Polish astronomer Nicolaus Copernicus. In this theory, the sun is at the center of the solar system and all the planets and heavenly bodies revolve around it.

Nuclear power plant is example of invention related to which field ?

  1. Electricity

  2. Education

  3. E learning

  4. Medication


Correct Option: A
Explanation:

Nuclear energy is converted into electrical energy in a nuclear power plant.

State whether given statement is True or False.
Cashless transaction can be carried out with ATM ?

  1. True

  2. False


Correct Option: A
Explanation:

Nowadays you can transfer the money to another account from your account using an ATM machine. 

Physics is sometimes referred to as exact science. Because.

  1. Physics interacts with almost all the sciences

  2. Due important is given for the measurement of quantities

  3. It involves philosophy

  4. Physics is related more closely to mathematics than any other science


Correct Option: B
Explanation:

More importance is given to measurement of quantities, i.e., qualitative analysis. 

Which among the following has the strongest intermolecular force between their molecules?

  1. Milk

  2. Water

  3. Sodium chloride

  4. Air

  5. None of these


Correct Option: B

Mass of a material varies with temperature.

  1. True

  2. False

  3. Nither

  4. Either


Correct Option: B
Explanation:

Mass is defined as amount of matter something contains. So it it is independent properties of any other properties. 

Option B

Sun spins around once every

  1. $26$ days

  2. $27.4$ days

  3. $27$ cas

  4. $30$ days


Correct Option: B
Explanation:

The sun rotates on its axis once every 27.4 days

Electron microscope is based on which scientific principle?

  1. Light amplification by stimulated emission of radiation

  2. Wave nature of electrons

  3. Digital logic

  4. Reflection of ultrasonic waves


Correct Option: B
Explanation:

Electron microscope is based on the principle of De-Broglie hypothesis of wave-nature of electrons.

Werner Heisenberg is known for his work on 

  1. Inelastic scattering of light by molecules

  2. Quantum mechanics: Uncertainty principle

  3. Theory of super conductivity

  4. Expanding universe


Correct Option: B
Explanation:

Answer is B

In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables, such as position and momentum, cannot be known simultaneously.

Bose-Einstein condensate is based on which scientific principle?

  1. Magnetic confinement of plasma

  2. Trapping and cooling of atoms by laser beams and magnetic fields

  3. Wave nature of electrons

  4. Motion of charged particles in electromagnetic fields


Correct Option: B
Explanation:

Bose-Einstein  condensate is made by trapping and cooling of atoms by laser beams and magnetic fields.

What was the major contribution/discoveries of  Archimedes?

  1. Principle of buoyancy; Principle of the lever

  2. Wave theory of light

  3. Laws of electromagnetic induction

  4. Generation of electromagnetic waves


Correct Option: A
Explanation:

Archimedes discovered the principal of buoyancy when he was taking a both observed watts getting displaced when he got into the both tub.He also discovered the principle of the lever.(a)

The Giant Metrewave Radio Telescope (GMRT) is related to _________________.

  1. Superconductivity

  2. Generation, propagation and detection of electromagnetic waves

  3. Detection of cosmic radio waves

  4. Trapping and cooling of atoms by laser beams and magnetic fields


Correct Option: C
Explanation:

The Giant Metrewave Radio Telescope (GMRT) is related to Detection of cosmic radio waves.

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