This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 49 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 49 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The kind of image formed by all convex mirrors is A) Real. B) Virtual. C) Erect or upright. D) Inverted. Show Answer Correct Answer: B) Virtual. 2. Resolve vector L into components Lx and Ly if the length of vector L is 15 m and its reference angle is 200. A) 13.9 m, 5.10 m. B) 14 m, 5 m. C) 14.1, 5.13 m. D) 14.2, 5.20 m. Show Answer Correct Answer: B) 14 m, 5 m. 3. Inside an aeroplane, flying at a high altitude, A) The pressure is the same as that outside. B) Normal humidity and partial vacuum are maintained. C) The pressure inside is less than the pressure outside. D) Normal atmospheric pressure is maintained by the use of air pumps. Show Answer Correct Answer: D) Normal atmospheric pressure is maintained by the use of air pumps. 4. It refers to the closeness of two or more measurements to each other A) Precision. B) Least count. C) Unit equality. D) Accuracy. Show Answer Correct Answer: A) Precision. 5. Who discovered the evolution of stars A) Albert Einstein. B) Sir CV Raman. C) S Chendrashekaran. D) Chandrababu ft. Show Answer Correct Answer: C) S Chendrashekaran. 6. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called A) Fast breeding. B) Nuclear fusion. C) Nuclear fission. D) Nuclear reaction. Show Answer Correct Answer: C) Nuclear fission. 7. Which of the following statements is false about electric field lines A) Electric field lines cannot cross. B) Electric field lines point away from positive charge. C) Electric field lines are always straight lines. D) Electric field lines show how a proton would move in an electric field. Show Answer Correct Answer: C) Electric field lines are always straight lines. 8. The electrical force between charges is strongest when the charges are A) Close together. B) Far apart. C) The electric force is constant everywhere. D) There is no pattern. Show Answer Correct Answer: A) Close together. 9. If the Voltage is increased and the resistance stays the same, Current will A) Increase. B) Decrease. C) Stay the same. D) X. Show Answer Correct Answer: A) Increase. 10. Which of the following laws is accounted for when a closed calorimeter is used in an experiment to determine the amount of heat transferred? A) Law of Entropy. B) Zeroth Law of Thermodynamics. C) Law of Conservation of Energy. D) All of the above. Show Answer Correct Answer: C) Law of Conservation of Energy. 11. When capacitors is arrange in series (3 capacitors), the equivalent capacitance C is A) C = C1 + C2 + C3. B) 1/C = 1/C1 + 1/C2 + 1/C3. C) C = QV1 + QV2 + QV3. D) C = CR1 + CR2 + CR3. Show Answer Correct Answer: B) 1/C = 1/C1 + 1/C2 + 1/C3. 12. Why do scientists use models. A) To make predictions. B) To interpret data. C) To determine if variables are related. D) To make predictions, interpret data, and determine if variables are related. Show Answer Correct Answer: D) To make predictions, interpret data, and determine if variables are related. 13. Which of these temperatures is likely when a container of water at 20$^ \circ$C is mixed with water at 28$^ \circ$C? A) 18$^ \circ$C. B) 22$^ \circ$C. C) 30$^ \circ$C. D) 38$^ \circ$C. Show Answer Correct Answer: B) 22$^ \circ$C. 14. What is wave speed? A) The number of complete cycles per second. B) The time taken to complete one cycle. C) The displacement between equilibrium position and maximum position. D) The distance travelled by a wave in one second. Show Answer Correct Answer: D) The distance travelled by a wave in one second. 15. What is the most accurate and precise method to measure the thickness of a coin? A) A Use a micrometer screw gauge. B) B Use a ruler and look at the scale perpendicularly. C) C Use a top pan balance. D) D Use the displacement method with water in a measuring cylinder. Show Answer Correct Answer: A) A Use a micrometer screw gauge. 16. What does the letter 'I' stand for in Ohm's Law? A) Voltage. B) Charge. C) Current. D) Capacitance. Show Answer Correct Answer: C) Current. 17. Persistence of vision is the principle behind? A) Cinema. B) Camera. C) Periscope. D) Spectroscope. Show Answer Correct Answer: A) Cinema. 18. A hair dryer draws 1 200 W, a curling iron draws 800 W, and an electric light fixture draws 500 W. If all three of these appliances are operating in parallel on a 120-V circuit, what is the total current drawn? A) 19.4 A. B) 20.8 A. C) 25.4 A. D) 36.7 A. Show Answer Correct Answer: B) 20.8 A. 19. The SI unit consists of ..... fundamental units. A) Three. B) Two. C) Seven. D) Six. Show Answer Correct Answer: C) Seven. 20. In series connection of capacitors, what is conserved physically? A) Capacitance. B) Distance. C) Stored charge. D) Voltage. Show Answer Correct Answer: C) Stored charge. ← 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