This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Physics > Physics – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is NOT true about a temperature that was read from a thermometer dipped in Styrofoam with cold water? A) It indicates how cold the water is. B) It indicates how cold the thermometer is. C) It indicates how cold the system is. D) All of these are true. Show Answer Correct Answer: D) All of these are true. 2. Large astronomical telescopes always use as objective A) Lens. B) Mirror. C) Combinations of lenses. D) None of the above. Show Answer Correct Answer: C) Combinations of lenses. 3. How many inches is 9'10" ? A) 129". B) 116". C) 118". D) 228". Show Answer Correct Answer: C) 118". 4. Which of the following is the vertical motion displacement of the projectile? A) $ V_y=V_yi-gt$. B) $ V_x=V_xi$. C) $ y=V_yit-1/2gt^2$. D) $ x=V_xt$. Show Answer Correct Answer: C) $ y=V_yit-1/2gt^2$. 5. Constant acceleration means the ..... stays the same, while the ..... changes per each time interval A) Displacement; change in velocity. B) Velocity:change in velocity. C) Velocity; time. D) Change in velocity; displacement. Show Answer Correct Answer: D) Change in velocity; displacement. 6. Which one of the following has the same unit as the rate of change of momentum? A) Energy. B) Acceleration. C) Work. D) Weight. Show Answer Correct Answer: D) Weight. 7. The Coulomb is the unit for A) Charge. B) Mass. C) Distance. D) Force. Show Answer Correct Answer: A) Charge. 8. Give the equivalent of unit of the give units1 inch A) 3.788 liters. B) 2.54 cm. C) 4.186 joules. D) Accuracy. Show Answer Correct Answer: B) 2.54 cm. 9. A machine does 80 J of work in 15 seconds. How much power is that? A) 1 200 kW. B) 5.33 kW. C) 1 200 Watts. D) 5.33 Watts. Show Answer Correct Answer: D) 5.33 Watts. 10. The SI base unit for time is A) 1 second. B) 1 hour. C) 1 day. D) 1 minute. Show Answer Correct Answer: A) 1 second. 11. Rev/min is equivalent to which of the following? A) 60 rad/s. B) 273 rad/s. C) 2600 rad/s. D) 43.3 rad/s. Show Answer Correct Answer: B) 273 rad/s. 12. Sound travels at the fastest speed in A) Air. B) Water. C) Vacuum. D) Steel. Show Answer Correct Answer: D) Steel. 13. When the distances become double? A) When the object goes back to its starting position. B) When the objects travel from an initial position up to the final position. C) When the objects stay at rest. D) When the object travels in the opposite direction. Show Answer Correct Answer: A) When the object goes back to its starting position. 14. Parsec is a unit of..... A) Pressure. B) Time. C) Astronomical distance. D) Energy. Show Answer Correct Answer: C) Astronomical distance. 15. Consider two vectors both directed to the east and with a magnitude of 10 m. What will be the resultant vector when they are added? A) 20 m, east. B) 5 m, east. C) 10 m, east. D) 0. Show Answer Correct Answer: A) 20 m, east. 16. What is represented by the area under a force-displacement graph? A) Work done. B) Rate of change of kinetic energy. C) Change in momentum. D) Acceleration. Show Answer Correct Answer: A) Work done. 17. Natural radioactivity was discovered by A) Ernest Rutherfor. B) Enrico Fermi. C) Marie Curie. D) Henri Becquerel. Show Answer Correct Answer: D) Henri Becquerel. 18. A ray of light passing through the focal point at an angle to the optic axis of a concave mirror is reflected back A) In the horizontal direction. B) Through the center of the sphere. C) Parallel to the optic axis. D) Through the focal point. Show Answer Correct Answer: C) Parallel to the optic axis. 19. If a car moves 12 km North, 19 km East, and 12 km South, what is its displacement? A) 43 km, South. B) 31 km, North. C) 19 km, East. D) 12 km, West. Show Answer Correct Answer: C) 19 km, East. 20. What is the SI unit of work? A) Jewels (J). B) Watt (W). C) Joule (J). D) What (W). Show Answer Correct Answer: C) Joule (J). 21. It is the energy stored in objects that can be stretched or compressed A) ELASTIC POTENTIAL ENERGY. B) ELASTIC ENERGY. C) FLEXIBILITY. D) ELASTICITY. Show Answer Correct Answer: A) ELASTIC POTENTIAL ENERGY. 22. Metric ton= ..... quintal A) 4. B) 12. C) 57. D) 10. Show Answer Correct Answer: D) 10. 23. How can you tell one form of electromagnetic energy from another? A) Color. B) Amplitude. C) Wavelength. D) Speed. Show Answer Correct Answer: C) Wavelength. 24. An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object A) Is decreasing its velocity by 2.0 m/s every second. B) Is increasing its velocity by 2.0 m/s every second. C) Travels 2.0 m in every second. D) Is traveling at 2.0 m/s. Show Answer Correct Answer: D) Is traveling at 2.0 m/s. 25. What is the unit used to express the magnitude of an object's ability to store electric charge? A) Watts. B) Newton. C) Farad. D) Volts. Show Answer Correct Answer: C) Farad. 26. What is the gradient of a line on a velocity time graph an indicate? A) The distance travelled by an object. B) The instantaneous speed of an object. C) The acceleration of an object. D) None of above. Show Answer Correct Answer: C) The acceleration of an object. 27. Which law states, "The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature" . A) Newton's law of cooling. B) Doppler's Effect. C) Kirchhoff's Law. D) Stefan's Law. Show Answer Correct Answer: D) Stefan's Law. 28. These are used to control the amount of current. A) Capacitors. B) Dielectric. C) Insulators. D) Resistors. Show Answer Correct Answer: D) Resistors. 29. Which equation defines Elastic Potential Energy? A) U = x. B) U = 1/2 k x2. C) U = k x. D) U = 1/2 k x. Show Answer Correct Answer: B) U = 1/2 k x2. 30. How does light travel A) It curves around corners. B) Really slow. C) In a straight line. D) In circles. Show Answer Correct Answer: C) In a straight line. 31. What does a horizontal line on a velocity-time graph indicate? A) Constant distance. B) Constant velocity. C) Constant acceleration. D) None of above. Show Answer Correct Answer: B) Constant velocity. 32. Which of the following is the area under the line of acceleration vs time graph? A) Acceleration. B) Displacement. C) Velocity. D) Time. Show Answer Correct Answer: C) Velocity. 33. In which of the following industries is mica as a raw material? A) Cement. B) Electrical. C) Iron and Steel. D) Glass and Pottery. Show Answer Correct Answer: B) Electrical. 34. Which device is used to measure weight? A) Scales. B) Balance. C) Newton meter. D) All of the answers are correct. Show Answer Correct Answer: C) Newton meter. 35. It can be used to make a new unit larger or smaller than the base unit A) British or english system. B) Metric system. C) Derived units. D) Unit prefixes. Show Answer Correct Answer: D) Unit prefixes. 36. Where would time run the slowest? A) At rest on the surface of the Earth. B) At rest on the top of a tall mountain on Earth. C) On the ISS (international space station). D) None of above. Show Answer Correct Answer: A) At rest on the surface of the Earth. 37. Three resistors connected in parallel each carry currents labeled I1, I2 and I3. Which of the following expresses the value of the total current IT in the combined system? A) IT = (1/I1 + 1/I2 + 1/I3). B) IT = (1/I1 + 1/I2 + 1/I3)-1. C) IT = I1 + I2 + I3. D) IT = I1 = I2 = I3. Show Answer Correct Answer: C) IT = I1 + I2 + I3. 38. A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum? A) 25 kg m/s. B) 375 m/s. C) 375 kg m/s. D) 25 m/s. Show Answer Correct Answer: C) 375 kg m/s. 39. In the absence of air resistance, objects fall at constant A) Speed. B) Velocity. C) Acceleration. D) All of the above. Show Answer Correct Answer: C) Acceleration. 40. What is the formula for ohms law? A) E= MC squared. B) V =I x R. C) R X E = I. D) 1+2=3. Show Answer Correct Answer: B) V =I x R. 41. Which of the following is TRUE about electric charge? A) It is created from a chemical reaction. B) It can be transferred from atom to atom. C) It can be lost. D) It can be destroyed. Show Answer Correct Answer: B) It can be transferred from atom to atom. 42. Sound waves in air are A) Longitudinal. B) Polarised. C) Electromagnetic. D) Transverse. Show Answer Correct Answer: A) Longitudinal. 43. If a red-green flag is seen in green light it appears to be of which of the following colour? A) Green. B) Black. C) Red - Black. D) Black - Green. Show Answer Correct Answer: D) Black - Green. 44. What do all waves transfer? A) Sound. B) Energy. C) Light. D) Heat. Show Answer Correct Answer: B) Energy. 45. A useful method of expressing very small or very large numbers is A) The metric system. B) Arabic numerals. C) Scientific notation. D) Roman numerals. Show Answer Correct Answer: C) Scientific notation. 46. Some capacitors consist of two parallel plates separated by an insulating material called the ..... A) Capacitors. B) Dielectric. C) Insulators. D) Condensers. Show Answer Correct Answer: B) Dielectric. 47. What is the unit for gravitational field strength? A) KN. B) N/kg. C) N/kg/$^ \circ$C. D) N. Show Answer Correct Answer: B) N/kg. 48. The number of significant figures in 10001 COVID-19 cases is ..... A) Two. B) Three. C) Five. D) Unlimited. Show Answer Correct Answer: D) Unlimited. 49. Curved mirror whose reflecting surface is the inner part is A) Concave. B) Diffuse. C) Plane. D) Convex. Show Answer Correct Answer: A) Concave. 50. A property that can be measured by a number. A) Physical Property. B) Intensive Property. C) Chemical Property. D) Extensive Property. Show Answer Correct Answer: A) Physical Property. 51. Radium-226 undergoes alpha decay to become radon-222. The equation is:226 Ra 222 Rn + 4 He. 88 86 2Calculate the energy released if Ra-226 = 226.025406 u Rn-222 = 222.017574 u He = 4.002603 u A) 7.81 x 10-12 J. B) 7.81 x 10-11 J. C) 7.81 x 10-14 J. D) 7.81 x 10-13 J. Show Answer Correct Answer: D) 7.81 x 10-13 J. 52. Supersonic plane fly with the speed A) Of light. B) Less than the speed of sound. C) Of sound. D) Greater than the speed of sound. Show Answer Correct Answer: D) Greater than the speed of sound. 53. It states that the angle of incidence is equal to the angle of reflection. A) Snell's Law. B) Malus' Law. C) Law of Reflection. D) Law of Refraction. Show Answer Correct Answer: C) Law of Reflection. 54. A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s2, what is its velocity after 2 s? A) 0 m/s. B) 3 m/s. C) 0.5 m/s. D) 1 m/s. Show Answer Correct Answer: D) 1 m/s. 55. The basic function of an electromotive force in a circuit is to do which of the following? A) Convert electrical energy into some other form. B) Convert some other form of energy into electrical. C) None of the above choices are valid. D) None of above. Show Answer Correct Answer: B) Convert some other form of energy into electrical. 56. What is the perimeter of a rectangular room that has a length of 5.1 m and a width that is 2 m less than the length? A) 14.2 m. B) 24.4 m. C) 16.4 m. D) 20.4 m. Show Answer Correct Answer: A) 14.2 m. 57. Which of the following pairs has the same dimensions? A) Specific Heat and Latent Heat. B) Impulse and Momentum. C) Surface Tension and Force. D) Moment of Inertia and Torque. Show Answer Correct Answer: B) Impulse and Momentum. 58. Covert 300C to 0F A) 271.89. B) 359. C) 86. D) -1.11. Show Answer Correct Answer: C) 86. 59. What is the maximum height reached by a ball thrown into the air with initial velocity of 18 m/s at an angle of 25 degree? A) 37.27 m. B) 4.13 m. C) 1.08 m. D) 2.55 m. Show Answer Correct Answer: B) 4.13 m. 60. Which theory explains the geometric description of gravity as a curvature of spacetime around massive bodies? A) Theory of Special Relativity. B) Theory of General Relativity. C) Photoelectric Theory. D) Law of Universal Gravitation. Show Answer Correct Answer: B) Theory of General Relativity. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books