This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 12 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a capacitor, the opposite plates take on ..... charges. A) Positive. B) Negative. C) Similar. D) Opposite. Show Answer Correct Answer: D) Opposite. 2. Which one of the physical quantities is not a derived quantity? A) Acceleration. B) Force. C) Length. D) Velocity. Show Answer Correct Answer: C) Length. 3. What happens to the torque as the angle between the lever arm and the force applied decreases from 90 to zero? A) It decreases. B) It increases. C) It remains the same. D) It approaches infinity. Show Answer Correct Answer: A) It decreases. 4. 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. 5. 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) 32 ounces. D) 30 ounces. Show Answer Correct Answer: C) 32 ounces. 6. The statement "Precision is independent of accuracy. You can be very precise but inaccurate. You can also be accurate but imprecise." Is A) True. B) False. C) Maybe. D) Never true. Show Answer Correct Answer: A) True. 7. What happened during the eclipse experiment? A) The position of stars behind the sun moved outward. B) The position of stars behind the sun moved inward. C) The position of stars behind the sun remained unchanged. D) New stars that were never seen before appeared. Show Answer Correct Answer: A) The position of stars behind the sun moved outward. 8. 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) 170.69 months. B) 169.69 months. C) 168.69 months. D) 171.69 months. Show Answer Correct Answer: B) 169.69 months. 9. It is the velocity tangent to the circular path. A) Tangential Acceleration. B) Tangential Velocity. C) Centripetal Acceleration. D) Radius of Curvature. Show Answer Correct Answer: B) Tangential Velocity. 10. 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) -1.5E-11 N. B) 2.5E-11 N. C) -2.5E11 N. D) -7.5E-10 N. Show Answer Correct Answer: C) -2.5E11 N. 11. How many centimeters are there in 2 meters? A) 0.02cm. B) 200cm. C) 0.20cm. D) 250cm. Show Answer Correct Answer: B) 200cm. 12. Solar cell converts A) Solar energy into electrical energy. B) Electrical energy into light energy. C) Sound energy into electrical energy. D) Electrical energy into mechanical energy. Show Answer Correct Answer: A) Solar energy into electrical energy. 13. Choke is used to..... A) Convert AC to DC. B) Convert DC to AC. C) Reduce the current in AC circuit. D) Reduce the current in DC circuit. Show Answer Correct Answer: C) Reduce the current in AC circuit. 14. 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) Neutron star. C) Red giant. D) Binary star. Show Answer Correct Answer: B) Neutron star. 15. Which of the following scientist discovered the projectile motion? A) Albert Einstein. B) Charles Darwin. C) Isaac newton. D) Galileo Galilei. Show Answer Correct Answer: D) Galileo Galilei. 16. 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. 17. What is the unit of mass? A) G. B) Kg. C) N/kg. D) Kg m/s. Show Answer Correct Answer: B) Kg. 18. Momentum is a A) Scalar Quantity. B) Vector Quantity. C) Always Constant. D) Of thesenone. Show Answer Correct Answer: B) Vector Quantity. 19. Which of the following relationships of quantities is NOT true? A) 2 Mm = 2x 106 m. B) 5 mg = 0.005 g. C) 10 mg = 1 dg. D) 8 Gm = 8 x 109 m. Show Answer Correct Answer: C) 10 mg = 1 dg. 20. When the temperature of a strip of iron is increased, the length of the strip A) Increases. B) Decreases. C) May increase or decrease. D) Decreases in width as it gets longer. Show Answer Correct Answer: A) Increases. ← 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