Physical World CBSE Questions & Answers

Physical World

This is Physics Class 11 Physical World CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The microscopic domain of physics deals with
  • A
    None of these
  • B
    the constitution and structure of matter at the scales of stars and planets and their interaction with different elementary particles
  • C
    The constitution and structure of matter at the scales of atoms and nuclei and their interaction with different elementary particles
    Correct
  • D
    the constitution and structure of matter at the scales of atoms and nuclei and their interaction with different bodies on the earth
2
Proper framework for explaining microscopic phenomena is
  • A
    Quantum Theory
    Correct
  • B
    Maxwell’s theory
  • C
    Classical physics
  • D
    Theory of relativity
3
What is central to the growth of physics?
  • A
    Conjectural descriptions
  • B
    Speculative descriptions
  • C
    Qualitative descriptions
  • D
    Quantitative measurement
    Correct
4
The basic laws of physics are universal means
  • A
    he same laws apply in different continents
  • B
    the same laws apply in widely different contexts
    Correct
  • C
    he same laws do not apply on mars and stars
  • D
    the same laws apply in similar contexts
5
Scientists strategy in general is to
  • A
    Focus first on the complex features of a phenomenon and add its less significant aspects from the start
  • B
    Focus first on the essential features of a phenomenon and remove its less significant aspects.
    Correct
  • C
    keep building complicated theories
  • D
    Focus first on the complex features of a phenomenon and remove its less significant aspects
6
To get the law of free fall under gravity, it is better
  • A
    none of these
  • B
    to create a situation where in the air resistance is not negligible
  • C
    to create a situation where in the air resistance is negligible
    Correct
  • D
    to create a real world experiment of feather and stone
7
Unification in physics refers to
  • A
    Unifying competing theories by compromises
  • B
    Explaining by giving a unique theory for each new phenomenon
  • C
    Explaining by using dissimilar but theories having something in common
  • D
    Explaining diverse physical phenomena in terms of a few concepts and laws
    Correct
8
Which of the following is not a synonym of axiom
  • A
    basis
  • B
    postulate
  • C
    assumptions
  • D
    model
    Correct
9
Axioms are
  • A
    true but need proof
  • B
    self evident truth
    Correct
  • C
    false but need a proof
  • D
    assumptions made to explain a phenomenon
10
Hypothesis
  • A
    assumptions that cannot be verified
  • B
    assumptions made to explain a phenomenon and can be tested
    Correct
  • C
    assumptions that cannot be tested
  • D
    assumptions that are self evident
11
Universal law of gravitation does not explain
  • A
    bodies falling towards the earth
  • B
    motion of planets around the sun
  • C
    origin of gravitational attraction
    Correct
  • D
    pendulums
12
What the universal law of gravitation says is that, if we assume that any two bodies in the universe attract each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them, then we can explain
  • A
    origin of gravitational attraction
  • B
    How magnetic fields are the same as electrical fields
  • C
    bodies falling towards the earth
    Correct
  • D
    why the universe is expanding
13
Postulates are
  • A
    assumed to be false for the purpose of reasoning
  • B
    assumed to be true for the purpose of reasoning
    Correct
  • C
    can be proved to be false
  • D
    can be proved to be true
14
Model in physics refers
  • A
    An explanation of a particular phenomenon using, postulates qualitative and quantitative reasoning
    Correct
  • B
    A set of postulates
  • C
    A scaled down model of aero plane, ship etc.
  • D
    A theory with diverse applications
15
Technology is concerned with
  • A
    solving a math problem
  • B
    using computers for village folks
  • C
    solving a physics problem
  • D
    making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function
    Correct