CBSE Questions for Class 11 Engineering Physics Physical World Quiz 7 - MCQExams.com

Consider the following statements in the context of formulation of any law of Physics
I.explain the existing physical facts
II.no need of experimental verification
III.predict future results
Then, any formulated law of physics, should be true with respect to 
  • I and II
  • II and III
  • I and III
  • I , II and III
The given table shows the rank of three different minerals on the scale of hardness.
MineralRank of hardness
X$$5$$
Y$$3$$
Z$$8$$
Based on the data, which of the following results of scratch test will be obtained?
He introduced a triatomic theory of colour vision, was the first to observe ocular astigmatism, he proved that the accommodation of eye was affected by change of curvature of the crystalline lens, but most famour for his discovery of interference of light and for developing the wave theory of light. Who was this physician-cum-physicist?
  • Augustin Jean F. Fresnel
  • Humphrey Lloyd
  • Christiaan Huygens
  • Thomas Young
'Analytical Engine ' was invented by
  • Dewar
  • Daimler
  • Charles Babbage
  • None of these
In which of the following process a software is used to create a mathematical model of some physical object as shown in the image?
904271_357efceee2d644b8b7bd5390e9610fdf.png
  • 3D Modelling
  • 3D Simulation
  • 3D Rendering
  • 3D Merging
Law of gravity, law of magnetic force are examples of _____.
  • Imperative law
  • Physical law
  • Natural law
  • None of the above
Who in $$1939$$ suggested the name meson for middle-weight particles?
  • Abraham Pais
  • Homi J. Bhabha
  • Hideki Yukawa
  • C. Anderson
The first husband-wife team to get the Nobel Prize for Physics was.
  • Frederick Joliot-Irene Joliot-Curie
  • Pierre Curie-Marie Curie
  • Carl Cori-Gerty Cori
  • Gunnar Myrdal-Alva Myrdal
Name the latest theory of fundamental physics in which the basic entity is a one-dimensional object as against the 'zero-dimensional' points representing the elementary particles.
  • String theory
  • Supersymmetry
  • Symmetry
  • Superstring theory
Inverse square law of distance is followed by the
  • Gravitational forces
  • Electromagnetic forces
  • Both (a) and (b)
  • Neither (a) and nor (b)
Physics is sometimes referred to as exact science. Because.
  • Physics interacts with almost all the sciences
  • Due important is given for the measurement of quantities
  • It involves philosophy
  • Physics is related more closely to mathematics than any other science
Who was the first woman to fly in space?
  • Valentina Tereshkova
  • Rhea Seddon
  • Sally Ride
  • Anna Fisher
Which of the following does not depict the correct link between technology and physics. ?
  • Photocell - Photoelectric effect
  • Rocket propulsion - Laws of thermodynamics
  • Optical fibres - Total internal reflection of light
  • Fusion test reactor - Magnetic confinement of plasma
Pick out the correct statement 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.
  • $$S1\ and\ S3$$
  • $$S1,\ S2\ and\ S3$$
  • $$S1,\ S2\ and\ S4$$
  • $$S2\ and\ S3$$
Why does the police used dogs for detective work?
  • Because they have sharp eyesight
  • Because they can hear ultrasonic waves
  • Because they can identify objects by smell
  • All of these
Which of the following statements is incorrect. ?
  • Bohr gave theory of hydrogen atom and Yukawa, the theory of nuclear forces.
  • Law of gravitation was discovered by Newton and principle of inertia by Galileo
  • Laws of photoelectric effect were discovered by Einstein and laws of electromagnetic induction by Faraday.
  • Neutron was discovered by J.J.Thomson and electron was discovered by James Chadwick.
What is the study of the modern theory of the strong forces between quarks?
  • Quantum chromodynamics
  • Quantum electromagnetism
  • Quantum electrodynamics
  • Quantum astronomy
Which of the following statements is not correct. ?
  • Physics is the study of nature and natural phenomena.
  • Physics and technology are not related to each other.
  • Electrodynamics deals with electric and magnetic phenomena associated with charged and magnetic bodies.
  • The physical quantities that remain unchanged in a process are called conserved quantities.

Which of the following is not correct about nuclear forces?
  • They are the short-range attractive force
  • They are independent of charge.
  • They change repulsion at very close distance
  • the obey inverse square law
Which of the following statements is incorrect?
  • A cricketer moves his hands backgrounds while holding a catch.
  • A person falling from a certain height receives more injuries when he falls on a cemented floor than when he falls on a shape of sand.
  • It is easier to push a lawn mower than to pull it.
  • Mountain roads are generally made winding upwards rather than going straight up.
Animals make use of $$-----------$$ to carry out their physical activities and other tasks$$.$$
  • contact force
  • non$$-$$contact force
  • force of friction
  • muscular force
When TC for zero level of output is $$60$$, it is the value of _________.
  • AFC
  • TLC
  • MC
  • TVC
The shortest range of the fundamental force is associated with
  • strong nuclear force
  • gravitational force
  • electromagnetic force
  • weak nuclear force
Vikram Sarabhai's pHD thesis was titled _______.
  • Cosmic Ray studies in Gold Mines
  • Cosmic Ray Investigations in Tropical Latitudes
  • Gamma Ray Studies in Outer Space
  • Gamma Ray Studies in Tropical Areas.
On a summer morning at $$6$$ am, a honey bee located a nectar source in the same direction as the rising sun. It went back to the hive and performed a waggle dance which lasted for several hours. What will be the direction of the waggle dance at $$6$$ pm?
The enhanced force of cohesion in metals is due to
  • The covalent linkages between atoms
  • The exchange energy in mobile electron
  • The lack of exchange of valence electrons
  • The delocalization of valence electron between metallic kernels.
Which among the following has the strongest intermolecular force between their molecules?
  • Milk
  • Water
  • Sodium chloride
  • Air
  • None of these
What Benjamin Franklin invented?
  • Bifocal spectacles
  • Radio
  • Barometer
  • Hygrometer
$$Fg,Fe$$ and $$Fn$$ represent the gravitational, electromagnetic and nuclear forces respectively, then arrange them in increasing order of their strengths
  • $${F}_{n}<{F}_{e}<{F}_{g}$$
  • $${F}_{g}<{F}_{e}<{F}_{n}$$
  • $${F}_{e}<{F}_{g}<{F}_{n}$$
  • $${F}_{g}<{F}_{n}<{F}_{e}$$
Nano science is the study of fundamental principles that nature permits at the nanoscale or less than that $$i e . . . . . . . . . . . .$$ 
  • The classical mechanics
  • the wave mechanics
  • The quantum mechanics
  • none of these
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