# MCQ Questions For Class 11 Physics Chapter 1 Physical World

Students can refer to the following MCQs of physics class 11 chapter 1 with answers provided below based on the latest curriculum and examination pattern issued by CBSE and NCERT. Our teachers have provided here collection of multiple choice questions for Chapter 1 Physical World Class 11 Physics covering all topics in your textbook so that students can assess themselves on all important topics and thoroughly prepare for their exams

## Physical World MCQs of physics class 11 chapter 1 with answers

We have provided below MCQs of physics class 11 chapter 1 with answers which will help the students to go through the entire syllabus and practice multiple choice questions provided here with solutions. As MCQ Questions for Class 11 Physics pdf download can be really scoring for students, you should go through all problems provided below so that you are able to get more marks in your exams.

#### MCQ Questions for Class 11 Physical World

Question. Macroscopic domain includes
(a) phenomena at the laboratory
(b) terrestrial scales
(c) astronomical scales
(d) All of the above

D

Question. Write the dimensions of a × b in the relation E = b – x2 /at where E is the energy, x is the displacement and t is time
(a) ML2T
(b) M–1L2T1
(c) ML2T–2
(d) MLT–2

B

Question. In the relation P = α /β eαz/kΘ where P is pressure, Z is distance, k is Boltzmann constants and q is the temperature. The dimensional formula of b will be
(a) [M0L2T0]
(b) [M1L2T1]
(c) [M1L0T–1]
(d) [M0L2T–1]

A

Question. In a new system of units, the fundamental quantities mass, length and time are replaced by acceleration ‘a’, density ‘r’ and frequency ‘f’.
The dimensional formula for force in this system is
(a) [ρa4 f ]
(b) [ρa4 f–6]
(c) [ρ–1a–4f6]
(d) [ρ–1a–4 f–1]

B

Question. The man who is known as the Father of Experimental Physics is
(a) Newton
(b) Albert Einstein
(c) Galileo
(d) Rutherford

C

Question. The person who has been awarded the title of the Father of Physics of 20th century is
(b) Sir C.V. Raman
(c) Neils Bohar
(d) Albert Einstein

D

Question. Science is exploring, …x… and …y… from what we see around us. Here, x and y refer to
(a) qualitative, modify
(b) experiment, predict
(c) verification, predict
(d) reasoning, quantitative

B

Question. The branch of science which deals with nature and natural phenomena is called
(a) Sociology
(b) Biology
(c) Civics
(d) Physics

D

Question. Which of the following is true regarding the physical science?
(a) They deal with non-living things
(b) The study of matter are conducted at atomic or ionic levels
(c) Both (a) and (b)
(d) None of these

C

Question. The scientific principle involves in production of ultra high magnetic fields is
(a) super conductivity
(b) digital logic
(c) photoelectric effect
(d) laws of thermodynamics

A

Question. The relative error in the determination of the surface area of a sphere is a. Then the relative error in the determination of its volume is
(a) 2/3 α
(b 2/3 α
(c) 3/2 α
(d) α

C

Question. In an experiment the angles are required to be measured using an instrument, 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half- a degree (= 0.5°), then the least count of the instrument is:
(a) half minute
(b) one degree
(c) half degree
(d) one minute

D

Question. In SI units, the dimensions of √∈00 is:
(a) A–1TML3
(b) AT2 M–1L–1
(c) AT–3ML3/2
(d) A2T3 M–1L–2

D

Question. Consider the following statements and select the correct statement(s).
I. Optics deal with the phenomena involving light.
II. Unification means physical phenomena in terms of few concepts and laws.
III. Macroscopic domain of Physics deals with the constitution and structure of matter at the minute scales of atoms and nuclei.
(a) Only I
(b) Only II
(c) I and II
(d) II and III

A

Question. Match the Column I and Column II.
Column I                Column II
(A) Johannes Kepler        (1) Nuclear model of the atom
(B) Tycho Brahe              (2) Planetary motion
(C) Nicolas Copernicus     (3) Elliptical orbit theory
(D) Ernest Rutherford      (4) Circular orbit theory
(a) (A)→(2); (B)→(4); C→(3); (D)→(1)
(b) (A)→(1); (B)→(2); C→(3); (D)→(4)
(c) (A)→(2); (B)→(1); C→(4); (D)→(3)
(d) (A)→(3); (B)→(2); C→(4); (D)→(1)

A

Question. C.V. Raman got Nobel Prize for his experiment on
(a) dispersion of light
(b) reflection of light
(c) deflection of light
(d) scattering of light

D

Question. Louis de-Broglie is credited for his work on
(a) theory of relativity
(b) electromagnetic theory
(c) matter waves
(d) law of distribution of velocities

C

Question. Madam Marie Curie won Nobel Prize twice which were in the field of
(a) Physics and chemistry
(b) Chemistry only
(c) Physics only
(d) Biology only

A

Question. A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50 mm, 5.55 mm, 5.45 mm, 5.65 mm, The average of these four reading is 5.5375 mm and the standard deviation of the data is 0.07395 mm. The average diameter of the pencil should therefore be recorded as :
(a) (5.5375 ± 0.0739) mm
(b) (5.5375 ± 0.0740) mm
(c) (5.538 ± 0.074) mm
(d) (5.54 ± 0.07) mm

D

Question. A quantity x is given by (IFv2/WL4) in terms of moment of inertia I, force F, velocity v, work W and Length L. The dimensional formula for x is same as that of :
(a) planck’s constant
(b) force constant
(c) energy density
(d) coefficient of viscosity

C

Question. The period of revolution (T) of a planet moving round the sun in a circular orbit depends upon the radius (r) of the orbit, mass (M) of the sun and the gravitation constant (G). Then T is proportional to
(a) r1/2
(b) r
(c) r3/2
(d) r2

C

Question. A scientific way of doing things involve
(a) identifying the problem
(b) collecting data
(c) hypothesising a possible theory
(d) All of the above

D

Question. Two Indian born physicists who have been awarded Nobel Prize in Physics are
(a) H. J. Bhabha and APJ Kalam
(b) C.V. Raman and S. Chandrasekhar
(c) J.C. Bose and M.N. Saha
(d) S. N. Bose and H. J. Bhabha

B

Question.   Column I                  Column II
(A) Galileo Galilei      (1) Explanation of photoelectric effect.
(B) JC Bose              (2) Law of inertia.
(C) Albert Einstein    (3) Discovery of Ultra short radio waves.
(D) JJ Thomson        (4) Discovery of electron

(a) (A)→(2); (B)→(3); C→(1); (D)→(4)
(b) (A)→(1); (B)→(2); C→(4); (D)→(3)
(c) (A)→(1); (B)→(2); C→(3); (D)→(4)
(d) (A)→(3); (B)→(4); C→(1); (D)→(2)

A

Question. The man who has won Nobel Prize twice in physics is
(a) Einstein
(b) Bardeen
(c) Heisenberg

B

Question. Prof. Albert Einstein got nobel prize in physics for his work on
(a) special theory of relativity
(b) general theory of relativity
(c) photoelectric effect
(d) theory of specific heats

C

Question. Which of the following is wrongly matched ?
(a) Barometer-Pressure
(b) Lactometer-Milk
(c) Coulomb’s law-charges
(d) Humidity-Calorimeter

D

Question. Column I                         Column II
(A) J.C Maxwell          (1) Verified experimentally the prediction of electromagnetic force.
(B) Cario Rubia          (2) Unified electricity,magnetism and optics, showed that light is an EM waves.
(C) Isaac Newton       (3) Unified celestial and terrestrial mechanics.
(D) Michael Faraday   (4) Showed that electric and magnetic phenomenon i.e., electromagnetism.
(a) (A)→(1); (B)→(2); C→(4); (D)→(3)
(b) (A)→(2); (B)→(1); C→(3); (D)→(4)
(c) (A)→(2); (B)→(3); C→(4); (D)→(1)
(d) (A)→(2); (B)→(1); C→(4); (D)→(3)

B

Question. Who gave general theory of relativity?
(a) Einstein
(b) Marconi
(c) Ampere
(d) Newton

A

Question. Who discovered X-rays?
(b) Roentgen
(c) Thomson

B

Question. The field of work of S. Chandrashekar is
(a) theory of black hole
(b) Cosmic rays
(c) theory of relativity
(d) X-rays

A

Question. The exchange particles for the electromagnetic force are
(a) gravitons
(b) gluons
(c) photons
(d) mesons

C

Question. Which of the following statements is/are correct?
I. Strong nuclear force binds protons and neutrons in a nucleus.
II. In twentieth century, silicon chip triggered a revolutionary changes in technology of computer system.
III. The fossil fuels of the planet are dwindling fast and there is urgent need to discover new source of energy.
(a) Only I
(b) Only III
(c) I and II
(d) I, II and III

D

Question. Which of the following is the correct decreasing order of the strengths of four fundamental forces of nature ?
(a) Electromagnetic force > weak nuclear force > gravitational force > strong nuclear force
(b) Strong nuclear force > weak nuclear force > electromagnetic force > gravitational force
(c) Gravitational force > electromagnetic force > strong nuclear force > weak nuclear force
(d) Strong nuclear force > electromagnetic force > weak nuclear force > gravitational force

D

Question. If x = at + bt2, where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is
(a) km/s
(b) kms
(c) km/s2
(d) kms2

C

Question. A metal sample carrying a current along X-axis with density Jx is subjected to a magnetic field Bz (along z-axis). The electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz.
The constant of proportionality has SI unit.
(a) M2 /A
(b) M3 /AS
(c) m2 /As
(d) AS / M3

B

Question. The refractive index of water measured by the relation m = real depth / apparent depth is found to have values of 1.34, 1.38, 1.32 and 1.36; the mean value of refractive index with percentage error is
(a) 1.35 ± 1.48 %
(b) 1.35 ± 0 %
(c) 1.36 ± 6 %
(d) 1.36 ± 0 %

A

Question. The pair of physical quantities that has the different dimensions is :
(a) Reynolds number and coefficient of friction
(b) Curie and frequency of a light wave
(c) Latent heat and gravitational potential
(d) Planck’s constant and torque

D

Question. Force F is given in terms of time t and distance x by F = A sin (Ct) + B cos (Dx). Then, dimensions of A/B and C/D are
(a) [M0 L0 T0], [M0 L0 T–1]
(b) [M L T–2], [M0 L–1 T0]
(c) [M0 L0 T0], [M0 L T–1]
(d) [M0 L1 T–1], [M0 L0 T0]

C

Question. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 × 10–3 are
(a) 5, 1, 2
(b) 5, 1, 5
(c) 5, 5, 2
(d) 4, 4, 2

A

Question. N divisions on the main scale of a vernier calliper coincide with (N + 1) divisions of the vernier scale.
If each division of main scale is ‘a’ units, then the least count of the instrument is
(a) a
(b) a/N
(c) N/ N+ 1 x a
(d) a / N+1

D

Question. Given that K = energy, V = velocity, T = time. If they are chosen as the fundamental units, then what is dimensional formula for surface tension?
(a) [KV–2T–2]
(b) [K2V2T–2]
(c) [K2V–2T–2]
(d) [KV2T2]

A

Question. In the formula X = 5YZ2, X and Z have dimensions of capacitance and magnetic field, respectively. What are the dimensions of Y in SI units ?
(a) [M–3 L–2 T8 A4]
(b) [M–1L–2T4 A2]
(c) [M–2 L0 T–4 A–2]
(d) [M–2L–2T6 A3]

A

Question. From the following combinations of physical constants (expressed through their usual symbols) the only combination, that would have the same value in different systems of units, is:
(a) ch / 2πε02
(b) e2 / 2πε0 Gme2 (me = mass of electron)
(c) μ0ε0 / c2 x G /he2
(d) 2π √μ0ε/ce2 x h/G

B

Question. Which of the following is the weakest force?
(a) Nuclear force
(b) Gravitational force
(c) Electromagnetic force
(d) None of these

B

Question. When we hold a book in our hand, we are balancing the gravitational force on the book due to
(a) normal force provided by our hand
(b) friction force provided by our book
(c) both (a) and (b)
(d) None of these

A

Question. Which of the following has infinite range?
(a) Gravitational force
(b) Electromagnetic force
(c) Strong nuclear force
(d) Both (a) and (b)