This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 25 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which aspect of a black hole is NOT infinite? A) Density. B) Gravity. C) Mass. D) Smallness of singularity. Show Answer Correct Answer: C) Mass. 2. Someone safely orbiting a black hole is watching you fall into a black hole, what do they see? A) Time Dilation. B) Spaghettification. C) Length Contraction. D) Gravitational collapse. Show Answer Correct Answer: A) Time Dilation. 3. It is a law that applies only if the incident light passing through the analyzer is nearly polarized. A) Malus's Law. B) Law of Reflection. C) Snell's Law. D) Refraction Law. Show Answer Correct Answer: A) Malus's Law. 4. UNIT OF TEMPERATURE A) KELVIN. B) SEC. C) KG. D) METER. Show Answer Correct Answer: A) KELVIN. 5. In order to be ..... forces, their effects must cancel each other out and not cause a change in an object's motion. A) Balanced. B) Strong. C) Weak. D) Normal. Show Answer Correct Answer: A) Balanced. 6. A 2-C charge and 4-C charge attract each other with 10 N of force. How much will a 2-C charge and 8-C charge attract each other when placed the same distance apart? A) 5 N. B) 12 N. C) 10 N. D) 20 N. Show Answer Correct Answer: D) 20 N. 7. On a graph showing distance versus time, a horizontal line represents an object that is A) Moving at constant speed. B) Decreasing its speed. C) Increasing its speed. D) Not moving. Show Answer Correct Answer: D) Not moving. 8. 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. 9. 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. 10. How many inches is 9'10" ? A) 116". B) 118". C) 129". D) 228". Show Answer Correct Answer: B) 118". 11. Which of the following is the vertical motion displacement of the projectile? A) $ x=V_xt$. B) $ V_x=V_xi$. C) $ y=V_yit-1/2gt^2$. D) $ V_y=V_yi-gt$. Show Answer Correct Answer: C) $ y=V_yit-1/2gt^2$. 12. 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) Change in velocity; displacement. D) Velocity; time. Show Answer Correct Answer: C) Change in velocity; displacement. 13. Which one of the following has the same unit as the rate of change of momentum? A) Work. B) Energy. C) Acceleration. D) Weight. Show Answer Correct Answer: D) Weight. 14. The Coulomb is the unit for A) Charge. B) Force. C) Distance. D) Mass. Show Answer Correct Answer: A) Charge. 15. Give the equivalent of unit of the give units1 inch A) 2.54 cm. B) 3.788 liters. C) 4.186 joules. D) Accuracy. Show Answer Correct Answer: A) 2.54 cm. 16. A machine does 80 J of work in 15 seconds. How much power is that? A) 5.33 kW. B) 5.33 Watts. C) 1 200 Watts. D) 1 200 kW. Show Answer Correct Answer: B) 5.33 Watts. 17. The SI base unit for time is A) 1 day. B) 1 hour. C) 1 minute. D) 1 second. Show Answer Correct Answer: D) 1 second. 18. Rev/min is equivalent to which of the following? A) 2600 rad/s. B) 43.3 rad/s. C) 273 rad/s. D) 60 rad/s. Show Answer Correct Answer: C) 273 rad/s. 19. Sound travels at the fastest speed in A) Air. B) Steel. C) Water. D) Vacuum. Show Answer Correct Answer: B) Steel. 20. When the distances become double? A) When the objects stay at rest. B) When the object goes back to its starting position. C) When the object travels in the opposite direction. D) When the objects travel from an initial position up to the final position. Show Answer Correct Answer: B) When the object goes back to its starting position. ← PreviousNext →Related QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 7Physics Quiz 8Physics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books