# Class 11 Physics Chapter 1 Physical World MCQ Questions with Answer

Physical World Class 11 MCQ is one of the best strategies to prepare for the CBSE Class 11 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQ on Plant Kingdom Class 11, which will help them all through their board test.

## Physical World Class 11 MCQ Questions with Answer

Class 11 Physics MCQ with answers are given here to Chapter 1 Physical World. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 11 Physics syllabus. By Solving these Class 11 MCQs, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 11 Annual exam.

Learn Class 11 Physical World MCQs with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Class 11 Physics Physical World MCQ with answers given below

Question. 1 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 2. Macroscopic domain includes
(a) phenomena at the laboratory
(b) terrestrial scales
(c) astronomical scales
(d) All of the above

D

Question 3. 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 4. 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 5. 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 6. The man who is known as the Father of Experimental Physics is
(a) Newton
(b) Albert Einstein
(c) Galileo
(d) Rutherford

C

Question 7. 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 8. 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 9. The branch of science which deals with nature and natural phenomena is called
(a) Sociology
(b) Biology
(c) Civics
(d) Physics

D

Question 10. 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 11. 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 12. 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 13. 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 14. 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 15. 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 16. 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 17. 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 18. 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 19. 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 20. 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 21. 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 22. 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 23. The man who has won Nobel Prize twice in physics is
(a) Einstein
(b) Bardeen
(c) Heisenberg

B

Question 24. 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 25. 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

Whoever needs to take the CBSE Class 11 Board Exam should look at this MCQ. To the Students who will show up in CBSE Class 11 Physics Board Exams, It is suggested to practice more and more questions. Aside from the sample paper you more likely had solved. These Physical World Class 11 MCQ are ready by the subject specialists themselves.

Question 26.

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

B

Question 28. 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 29. Which of the following is wrongly matched ?
(a) Barometer-Pressure
(b) Lactometer-Milk
(c) Coulomb’s law-charges
(d) Humidity-Calorimeter

D

Question 30

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

A

Question 32. 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 33. 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 34. The exchange particles for the electromagnetic force are
(a) gravitons
(b) gluons
(c) photons
(d) mesons

C

Question 35. 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 36. 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 37. 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 38. 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 39. 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 40. 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 41. 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 42. 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 43. Which of the following is the weakest force?
(a) Nuclear force
(b) Gravitational force
(c) Electromagnetic force
(d) None of these

B

Question 44. 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 45. 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 46. Which of the following has infinite range?
(a) Gravitational force
(b) Electromagnetic force
(c) Strong nuclear force
(d) Both (a) and (b)

D

Question 47. 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

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