This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 1 Physical World And Measurement – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 1 Physical World And Measurement Quiz 2 (46 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The sides of a rectangle are 6.01 m and 12 m. Taking the significant figures into account, the area of the rectangle is A) 72.12 m$^{2}$. B) 72.1 m$^{2}$. C) 72.00 m$^{2}$. D) 72 m$^{2}$. Show Answer Correct Answer: D) 72 m$^{2}$. 2. Chandrashekhar limit is the largest practical unit of A) Length. B) Mass. C) Time. D) None of the above. Show Answer Correct Answer: B) Mass. 3. Which of the following pairs of physical quantities have same dimension? A) Force and power. B) Torque and energy. C) Torque and power. D) Force and torque. Show Answer Correct Answer: B) Torque and energy. 4. The dimensional formula of Planck's constant h is ..... A) [MLT$^{-1}$ ]. B) [ML$^{2}$T $^{-1}$ ]. C) [ML$^{2}$ T $^{-3}$]. D) [ML$^{3}$ T$^{-3}$]. Show Answer Correct Answer: B) [ML$^{2}$T $^{-1}$ ]. 5. A scientific theory A) Cannot be changed but can be reformulated. B) Is fixed once and for all because it is logical. C) Is changed to suit new fashion among scientists. D) Can be revised if required to fit new phenomenon or data. Show Answer Correct Answer: D) Can be revised if required to fit new phenomenon or data. 6. The dimensional formual for angular A) [MLT$^{-1}$]. B) [M$^{0}$L$^{2}$T$^{-2}$]. C) [ML$^{2}$T$^{-2}$]. D) [ML$^{2}$T$^{-1}$]. Show Answer Correct Answer: D) [ML$^{2}$T$^{-1}$]. 7. Which of the following will have the dimensions of time? A) R/L. B) C/L. C) LC. D) L/R. Show Answer Correct Answer: D) L/R. 8. Which of the following quantity is not a fundamental quantity? A) Mass. B) Time. C) Volume. D) Luminous intensity. Show Answer Correct Answer: C) Volume. 9. Which of the following is a possible final step in applying the scientific method A) Formulating a hypothesis. B) Formulation of a question. C) Analysis of test results. D) Building a theory. Show Answer Correct Answer: C) Analysis of test results. 10. Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be A) [ML$^{2}$ T$^{-1}$I$^{-1}$ ]. B) [ML$^{2}$ T$^{-3}$I$^{-2 }$]. C) [ML$^{2}$ T$^{-2}$ ]. D) [ML$^{2}$ T$^{-3}$I$^{-1}$ ]. Show Answer Correct Answer: B) [ML$^{2}$ T$^{-3}$I$^{-2 }$]. 11. Choose TWO(2) examples of base quantity A) Mass and density. B) Length and area. C) Length and mass. D) Mass and velocity. Show Answer Correct Answer: C) Length and mass. 12. If the dimensions of a physical quantity are given by [M$^{a}$L$^{b}$ T$^{c}$], then the physical quantity will be A) Acceleration if a =1, b = 1, c =-2. B) Force if a = 0, b =-1, c =-2. C) Pressure if a =1, b =-1, c =-2. D) Velocity if a = 1, b = 0, c =-2. Show Answer Correct Answer: C) Pressure if a =1, b =-1, c =-2. 13. Which two of the following five physical parameters have the same dimensions?(i) Energy Density (ii) Refractive index (iii) Dielectric constant (iv) Young's modulus (v) Magnetic field A) (i) and (iv). B) (iii) and (v). C) (i) and (iv). D) (i) and (v). Show Answer Correct Answer: A) (i) and (iv). 14. From the given three fundamental constants, select the combination that gives the dimension of length(i) Newton's gravitational constant (G)(ii) Speed of light in a vacuum (c)(iii) Planck's constant (h) A) $\sqrt{\frac{hG}{C^{\frac{5}{2}}}}$. B) $\sqrt{\frac{hc}{G}}$. C) $\sqrt{\frac{Gc}{h^{\frac{3}{2}}}}$. D) $\sqrt{\frac{hG}{c^{\frac{3}{2}}}}$. Show Answer Correct Answer: D) $\sqrt{\frac{hG}{c^{\frac{3}{2}}}}$. 15. The dimensional formula of pressure is A) [ML$^{-1}$T$^{-1}$]. B) [ML$^{-1}$T$^{-2}$]. C) [ML$^{-1}$T$^{2}$]. D) [MLT$^{-2}$]. Show Answer Correct Answer: B) [ML$^{-1}$T$^{-2}$]. 16. In an experiment, four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated P= $^{a3b2}$/$_{cd}$ %. Error in P is A) 10%. B) 4%. C) 14%. D) 7%. Show Answer Correct Answer: C) 14%. 17. Dimensional formula of self-inductance is A) [MLT$^{-2}$ A$^{-2}$]. B) [ML$^{2}$T$^{-2}$ A$^{-2}$]. C) [ML$^{2}$T$^{-2}$A$^{-1}$]. D) [ML$^{2}$T$^{-1}$A$^{-2}$]. Show Answer Correct Answer: B) [ML$^{2}$T$^{-2}$ A$^{-2}$]. 18. Which one of the following represents the correct dimensions of the coefficient of viscosity? A) M L$^{2}$ T$^{-1}$. B) M L$^{-2 }$T$^{-2}$. C) M L$^{-1}$ T$^{-2}$. D) M L$^{-1 }$T$^{-1}$. Show Answer Correct Answer: D) M L$^{-1 }$T$^{-1}$. 19. How many numbers of base SI units are there? A) 9. B) 7. C) 10. D) 5. Show Answer Correct Answer: B) 7. 20. Ust as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim? A) Davisson and Germer Experiment. B) Michelson Morley experiment. C) Experimental discovery of positron. D) Scattering of alpha particle or the gold foil experiment. Show Answer Correct Answer: C) Experimental discovery of positron. 21. A thought experiment in physics is one A) Which is theoretically possible but experimentally not feasible. B) Which is neither theoretically nor experimentally feasible. C) Which is performed by non-physicist. D) None of the above. Show Answer Correct Answer: B) Which is neither theoretically nor experimentally feasible. 22. Planck's constant has the dimensions of A) Linear momentum. B) Angular momentum. C) Power. D) Enegry. Show Answer Correct Answer: B) Angular momentum. 23. All the following physical quantities are derived quantities except ..... A) Area. B) Speed. C) Velocity. D) Mass. Show Answer Correct Answer: D) Mass. 24. If x = $\alpha$t +bt$^{2}$, where x is the distance travelled by the body in kilometer while t is the time in second, then the unit of b is A) Km-s$^{2}$. B) Km/s$^{2}$. C) Km/s. D) Km-s. Show Answer Correct Answer: B) Km/s$^{2}$. 25. Define vector quantity. A) Quantity which has magnitude. B) Quantity which has both magnitude and direction. C) Quantities that cannot be defined in term of other physical quantities. D) Quantities derived from combination of base quantities through multiplication or division or both. Show Answer Correct Answer: B) Quantity which has both magnitude and direction. 26. The number of significant figures in 0.00040 m is A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: B) 2. 27. The Dimension of Boltzmann constant is ..... A) [ML$^{-2}$ T$^{-2}$ K$^{-1}$]. B) [ML$^{-2}$ T $^{2}$ K$^{-1}$]. C) [ML$^{2}$ T$^{2}$ K$^{1}$]. D) [ML$^{2}$ T$^{-2}$ K$^{-1}$]. Show Answer Correct Answer: D) [ML$^{2}$ T$^{-2}$ K$^{-1}$]. 28. The value of 0.99-0.989 is A) 0.010x10$^{-1}$. B) 0.001. C) 0.1x10$^{-3}$. D) 0.01x10$^{-1}$. Show Answer Correct Answer: D) 0.01x10$^{-1}$. 29. High precision instruments are used to eliminate A) Random error. B) Instrumental error. C) Least count error. D) None of the above. Show Answer Correct Answer: C) Least count error. 30. Which the following is a dimensionless quantity A) Velocity. B) Gravitational constant. C) Refractive index. D) Planck's constant. Show Answer Correct Answer: C) Refractive index. 31. A Certain body weighs 22.42 g and has a measured volume of 4.7cc, The possible error in the measurement of mass and volume are 0.01g and 0.1 cc. Then maximum error in the density will be A) 22%. B) 0.2%. C) 0.02%. D) 2%. Show Answer Correct Answer: B) 0.2%. 32. Two quantities are given in which one of which is a vector and another one is a scalar having the same dimensional formula are: A) Work and energy. B) Torque and work. C) Impulse and momentum. D) Power and pressure. Show Answer Correct Answer: B) Torque and work. 33. Calculate the value of the dot product of the two vectors whose magnitudes are 3 units and 4 units and their resultant is 1 unit. A) +6 units. B) -12 units. C) -1 unit. D) 0. Show Answer Correct Answer: B) -12 units. 34. If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be A) 4%. B) 2%. C) 6%. D) 8%. Show Answer Correct Answer: C) 6%. 35. The unit of permittivity of free space, E$_{0}$ is A) Coulomb$^{2}$/(newton-metre$^{2}$). B) Coulomb/newton-metre. C) Coulomb$^{2}$/newton-metre$^{2}$. D) Newton-metre$^{2/}$coulomb$^{2}$. Show Answer Correct Answer: C) Coulomb$^{2}$/newton-metre$^{2}$. 36. Zero error of an instrument introduces: A) Systematic error. B) Random error. C) Both. D) None. Show Answer Correct Answer: A) Systematic error. 37. Find SI unit of density A) Kg/m$^{3}$. B) G/m$^{3}$. C) Kg/m$^{2}$. D) G/m$^{2}$. Show Answer Correct Answer: A) Kg/m$^{3}$. 38. Which of the following the smallest unit: A) Metre. B) Angstrom. C) Fermi. D) Millimeter. Show Answer Correct Answer: C) Fermi. 39. The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of A) Velocity. B) Time. C) Frequency. D) Angular momentum. Show Answer Correct Answer: C) Frequency. 40. The value of Chandra Shekher Limit is A) Half the mass of Sun. B) 2.4 times the mass of Sun. C) 1.4 times the mass of Sun. D) None of these. Show Answer Correct Answer: C) 1.4 times the mass of Sun. 41. A pair of physical quantities having same dimensional formula is A) Force and torque. B) Work and enegry. C) Force and impulse. D) Linear momentum and angular momentum. Show Answer Correct Answer: B) Work and enegry. 42. A quantity y is related to another quantity x by the equation y = kx$^{a}$ where k and a are constants. If percentage error in the measurement of x is p, then that in y depends upon: A) K and a. B) P and a. C) X and a. D) P, k and a. Show Answer Correct Answer: B) P and a. 43. If enegry (E), velocity (v) and time (T) are chosen as the fundamental quantities, the dimensional formula of surface tension will be A) [Ev$^{-2}$ v$^{-1}$ T$^{-3}$]. B) [Ev$^{-2}$T$^{-1}$]. C) [Ev$^{-1}$T$^{-2}$]. D) [Ev$^{-2}$T$^{-2}$]. Show Answer Correct Answer: D) [Ev$^{-2}$T$^{-2}$]. 44. The word Science originates from the Latin verb Scientia meaning A) To observe. B) To know. C) To experience. D) To see. Show Answer Correct Answer: B) To know. 45. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1x10$^{-3}$ are A) 5, 1, 5. B) 4, 4, 2. C) 5, 5, 2. D) 5, 1, 2. Show Answer Correct Answer: D) 5, 1, 2. 46. Of the following quantities, which one has dimensions different from the remaining three? A) Energy per unit volume. B) Force per unit area. C) Product of voltage and charge per unit volume. D) Angular momentum. Show Answer Correct Answer: D) Angular momentum. ← PreviousRelated QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part I) Chapter 1 Physical World And Measurement Quiz 1Class 11 Physics (Part I) Chapter 10 Oscillations And Waves QuizClass 11 Physics (Part I) Chapter 2 Kinematics QuizClass 11 Physics (Part I) Chapter 3 Laws Of Motion QuizClass 11 Physics (Part I) Chapter 4 Work QuizClass 11 Physics (Part I) Chapter 6 Gravitation QuizClass 11 Physics (Part I) Chapter 7 Properties Of Bulk Matter QuizClass 11 Physics (Part I) Chapter 8 Thermodynamics Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books