This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Physics > Physics – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is most likely to be the mass of a supermassive black hole? A) 100, 000, 000, 000 solar masses. B) 50 solar masses. C) 5 solar masses. D) 100 solar masses. Show Answer Correct Answer: A) 100, 000, 000, 000 solar masses. 2. An object takes a curved path when thrown or launched near the surface of the Earth? The curved path is called ..... A) Terminal Velocity. B) Trajectory. C) Free Fall. D) Gravity. Show Answer Correct Answer: B) Trajectory. 3. When light incident on a prism separates into a spectrum, we call the process A) Reflection. B) Interference. C) Diffraction. D) Dispersion. Show Answer Correct Answer: D) Dispersion. 4. The electric current flows only in one direction. A) Direct Current (DC). B) Ohm's Law. C) Electric Current. D) Alternating Current (AC). Show Answer Correct Answer: A) Direct Current (DC). 5. What is the impulse if the force is 55 N to the west for 0.55 s? A) 30.25 Ns. B) 100 Ns, west. C) 30.25 Ns, east. D) 100 Ns, east. Show Answer Correct Answer: A) 30.25 Ns. 6. The Period of revolution round the sun is maximum by which among the following planets? A) Mars. B) Venus. C) Earth. D) Mercury. Show Answer Correct Answer: A) Mars. 7. Forces can be added together only if they are? A) Substantial. B) Unaffected by gravity. C) Balanced forces. D) Acting on the same object. Show Answer Correct Answer: D) Acting on the same object. 8. A 2 C charge experiences a force of 40 N when put at a certain location in space. The electric field at that location is.. A) 42 N/C. B) 2 N/C. C) 80 N/C. D) 20 N/C. Show Answer Correct Answer: D) 20 N/C. 9. How can you increase the acceleration of an object? A) Decrease its mass. B) Decrease the force applied to it. C) Increase its friction. D) Increase its mass. Show Answer Correct Answer: A) Decrease its mass. 10. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation? A) Polarization. B) Scattering. C) Interference. D) Diffraction. Show Answer Correct Answer: B) Scattering. 11. Which of the following is the slope of velocity vs time graph? A) Time. B) Acceleration. C) Displacement. D) Velocity. Show Answer Correct Answer: B) Acceleration. 12. The electric field in a certain region of space is 30 N/C. What is the force on a 2 C charge in that space? A) 15 N. B) 60 N. C) 32 N. D) 45 N. Show Answer Correct Answer: B) 60 N. 13. The desire effect of using winglets on an aircraft's wingtips is to A) Increase the lift to drag ratio. B) Reduce the aspect ratio. C) Optimize wing dihedral and improve lateral stability. D) None of above. Show Answer Correct Answer: A) Increase the lift to drag ratio. 14. What is the unit of measurement used for current? A) Watts. B) Farads. C) Volts. D) Amps. Show Answer Correct Answer: D) Amps. 15. What would a negative value for Fe mean? A) The particles are moving away from each other. B) The particles have opposite charges. C) The particles have the same charge. D) The particles are moving towards each other. Show Answer Correct Answer: B) The particles have opposite charges. 16. A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration? A) 1.6 rad/s/s. B) 3.1 rad/s/s. C) 4.8 rad/s/s. D) 9.6 rad/s/s. Show Answer Correct Answer: A) 1.6 rad/s/s. 17. What is a non-contact force? A) A force that involves objects physically touching. B) A force that involves objects being very close. C) A force that involves objects that are not physically touching. D) None of above. Show Answer Correct Answer: C) A force that involves objects that are not physically touching. 18. How does a scientist reduce the frequency of human error and minimize a lack of accuracy? A) Take repeated measurements. B) Use the same method of measurement. C) Maintain instruments in good working order. D) All of these. Show Answer Correct Answer: D) All of these. 19. What type of image is formed when an object is placed at a distance of 1.5 focal lengths from a convex mirror? A) Inverted and virtual. B) Inverted and real. C) Erect and virtual. D) Erect and real. Show Answer Correct Answer: C) Erect and virtual. 20. If the force acting on a charged particle of (8x10-6C) due to an electric field is 4 N, the electric field in (N/C) is A) 5x105. B) 2x10-6. C) 2x106. D) 5x10-5. Show Answer Correct Answer: A) 5x105. 21. Who was the first Indian woman in space? A) Kalpana chawla. B) Sunita Willams. C) Koneru Humpy. D) None of the above. Show Answer Correct Answer: A) Kalpana chawla. 22. The critical angle in total internal reflection occurs when incident light on a surface is A) Refracted at 90$^ \circ$ to the normal. B) Reflected at 90$^ \circ$ to the normal. C) At maximum diffraction. D) Totally absorbed. Show Answer Correct Answer: A) Refracted at 90$^ \circ$ to the normal. 23. A cart is pushed and undergoes certain acceleration. Consider how the acceleration would compare if it were pushed with twice the net force while it's mass increased by four. Then its acceleration would be A) One quarter. B) Twice. C) The same. D) One half. Show Answer Correct Answer: D) One half. 24. What will happen to torque if the lever arm is doubled and the force is quadrupled? A) It will be increased by 1/2 its original value. B) It will decrease by a factor of eight. C) It will increase by a factor of eight. D) It will be reduced to 1/2 its original value. Show Answer Correct Answer: C) It will increase by a factor of eight. 25. Which of these values is greatest? A) 0.56. B) 0.0056. C) 5.6 x 10-2. D) 56 x 10-1. Show Answer Correct Answer: D) 56 x 10-1. 26. An object is ..... if its position changes relative to another object. A) A frame of refence. B) At reset. C) Magical. D) In motion. Show Answer Correct Answer: D) In motion. 27. Which of the given angle will have the farthest range when a projectile is launched? A) 60o. B) 75o. C) 45o. D) 15o. Show Answer Correct Answer: C) 45o. 28. Which of the following is not an action at a distance force? A) Normal Force. B) Gravitational Force. C) Electrical Force. D) Magnetic Force. Show Answer Correct Answer: A) Normal Force. 29. A ball with a mass of 500g is lifted onto a shelf which is 1.5 m above the ground. Calculate the gravitational potential energy gained by the ball (g = 9.8 m/s2 ) A) 7 350 Joule. B) 73.50 Joule. C) 735.0 Joule. D) 7.35 Joule. Show Answer Correct Answer: D) 7.35 Joule. 30. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media? A) Iron, air and water. B) Air, water and iron. C) Iron, water and air. D) Water, iron and air. Show Answer Correct Answer: B) Air, water and iron. 31. What is the unit of kinetic energy A) Horsepower. B) Watts. C) Joule. D) Kilocal. Show Answer Correct Answer: C) Joule. 32. In a bulb there are ..... terminals A) 8. B) 2. C) 5. D) 10. Show Answer Correct Answer: B) 2. 33. Intensity of sound at a point is ..... its distance from the source. A) Directly proportional to square of. B) Inversely proportional to. C) Directly proportional to. D) Inversely proportional to square of. Show Answer Correct Answer: D) Inversely proportional to square of. 34. A(n) ..... is a push or pull. A) Momentum. B) Force. C) Newton. D) Acceleration. Show Answer Correct Answer: B) Force. 35. What is the correct formula to find moment of force? A) Force x distance. B) Torque x distance. C) Force x speed. D) Distance x Speed. Show Answer Correct Answer: A) Force x distance. 36. Which among the following quantities is scalar? A) Force. B) Work. C) Acceleration. D) Velocity. Show Answer Correct Answer: D) Velocity. 37. The rotational effect of a force on a body about an axis of rotation is described in terms of A) Centre of gravity. B) Moment of force. C) Centripetal force. D) Centrifugal force. Show Answer Correct Answer: B) Moment of force. 38. A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels? A) 4 N. B) 40 N. C) 100 N. D) 10 N. Show Answer Correct Answer: C) 100 N. 39. A skydiver reaches terminal velocity. Then he opens his parachute. What happens to the skydiver as the parachute opens? A) A There is a decrease in weight. B) D There is movement upwards. C) B There is acceleration upwards. D) C There is an increase in speed. Show Answer Correct Answer: C) B There is acceleration upwards. 40. In a capacitor, the opposite plates take on ..... charges. A) Similar. B) Opposite. C) Negative. D) Positive. Show Answer Correct Answer: B) Opposite. 41. Which one of the physical quantities is not a derived quantity? A) Velocity. B) Force. C) Length. D) Acceleration. Show Answer Correct Answer: C) Length. 42. What happens to the torque as the angle between the lever arm and the force applied decreases from 90 to zero? A) It remains the same. B) It approaches infinity. C) It decreases. D) It increases. Show Answer Correct Answer: C) It decreases. 43. Which of following in not a property of cathode ray A) These rays can ionise gases. B) These rays can penetrate through thin metal foils. C) These rays make materials cool on which they fall. D) Cathode rays are invisible and travel in a straight line. Show Answer Correct Answer: C) These rays make materials cool on which they fall. 44. A dog has three puppies. Spot weighs 12 ounces. Rascal weighs 9.5 ounces. Socks weighs 10.2 ounces. What is the total weight of the litter expressed to the correct number of significant figures? A) 31.7 ounces. B) 31 ounces. C) 30 ounces. D) 32 ounces. Show Answer Correct Answer: D) 32 ounces. 45. The statement "Precision is independent of accuracy. You can be very precise but inaccurate. You can also be accurate but imprecise." Is A) False. B) Maybe. C) Never true. D) True. Show Answer Correct Answer: D) True. 46. What happened during the eclipse experiment? A) New stars that were never seen before appeared. B) The position of stars behind the sun moved inward. C) The position of stars behind the sun remained unchanged. D) The position of stars behind the sun moved outward. Show Answer Correct Answer: D) The position of stars behind the sun moved outward. 47. Mary is 14 years, 1 month and 20.7 days old today. How many months Mary is alive up until now? Use:1 year = 12 months, and 1 month = 30 days A) 169.69 months. B) 170.69 months. C) 168.69 months. D) 171.69 months. Show Answer Correct Answer: A) 169.69 months. 48. It is the velocity tangent to the circular path. A) Tangential Velocity. B) Tangential Acceleration. C) Centripetal Acceleration. D) Radius of Curvature. Show Answer Correct Answer: A) Tangential Velocity. 49. Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of-5 C and the other has a charge of +2.0 C. A) -2.5E11 N. B) -7.5E-10 N. C) 2.5E-11 N. D) -1.5E-11 N. Show Answer Correct Answer: A) -2.5E11 N. 50. How many centimeters are there in 2 meters? A) 250cm. B) 0.02cm. C) 0.20cm. D) 200cm. Show Answer Correct Answer: D) 200cm. 51. Solar cell converts A) Electrical energy into light energy. B) Sound energy into electrical energy. C) Electrical energy into mechanical energy. D) Solar energy into electrical energy. Show Answer Correct Answer: D) Solar energy into electrical energy. 52. Choke is used to..... A) Convert DC to AC. B) Reduce the current in AC circuit. C) Convert AC to DC. D) Reduce the current in DC circuit. Show Answer Correct Answer: B) Reduce the current in AC circuit. 53. Massive stars that are not quite large enough to turn into a black hole will turn into what when they collapse? A) White dwarf. B) Binary star. C) Neutron star. D) Red giant. Show Answer Correct Answer: C) Neutron star. 54. Which of the following scientist discovered the projectile motion? A) Galileo Galilei. B) Charles Darwin. C) Isaac newton. D) Albert Einstein. Show Answer Correct Answer: A) Galileo Galilei. 55. Metals are good conductors of electricity because A) They contain free electrons. B) The atoms are lightly packed. C) They have high melting point. D) All of the above. Show Answer Correct Answer: A) They contain free electrons. 56. What is the unit of mass? A) Kg m/s. B) Kg. C) G. D) N/kg. Show Answer Correct Answer: B) Kg. 57. Which of the following relationships of quantities is NOT true? A) 2 Mm = 2x 106 m. B) 10 mg = 1 dg. C) 8 Gm = 8 x 109 m. D) 5 mg = 0.005 g. Show Answer Correct Answer: B) 10 mg = 1 dg. 58. When the temperature of a strip of iron is increased, the length of the strip A) Increases. B) May increase or decrease. C) Decreases in width as it gets longer. D) Decreases. Show Answer Correct Answer: A) Increases. 59. The critical angle of water when refracted angle is 90 $^ \circ$ and refractive index for water and air is 1.33 and 1 is A) 51 $^ \circ$. B) 50 $^ \circ$. C) 48.8 $^ \circ$. D) 49.1 $^ \circ$. Show Answer Correct Answer: C) 48.8 $^ \circ$. 60. What type of force influences the projectiles to travel with a parabolic trajectory? A) Tension. B) Friction. C) Gravity. D) Applied. Show Answer Correct Answer: C) Gravity. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8Physics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books