This quiz works best with JavaScript enabled. Home > Science > Physics > Physics Basics > Physics – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 22 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which one is a Live Wire? A) Brown. Provides the alternating potential difference. B) Blue. Completes the circuit and carries away current. C) Green and Yellow. Only carries current when there is a fault. D) None of above. Show Answer Correct Answer: A) Brown. Provides the alternating potential difference. 2. Which of the following is not an SI base quantity? A) Length. B) Temperature. C) Time. D) Weight. Show Answer Correct Answer: D) Weight. 3. Huda jogs 3000 meters due north in 15 minutes and then jogs 4000 meters due south in 20 minutes. A) 3.3 m/s. B) 0 m/s. C) 1.2 m/s. D) 21 m/s. Show Answer Correct Answer: B) 0 m/s. 4. In optics an object which has higher refractive index is called A) Optically rarer. B) Optically denser. C) Optical density. D) Refractive index. Show Answer Correct Answer: B) Optically denser. 5. Why is light refracted? A) Light speeds up. B) Light slows down. C) Light speed stays the same. D) Light can either slow down or speed up. Show Answer Correct Answer: D) Light can either slow down or speed up. 6. What is the average speed of a cheetah that ran 55 meters in 5 minutes? A) 11 m/mi. B) 605 m/mi. C) 10 m/mi. D) None of above. Show Answer Correct Answer: A) 11 m/mi. 7. Calculate volume of aluminum with mass of 5400kg and a density of 2700kg/m3 A) 0.5m3. B) 2m2. C) 2m3. D) 0.5m2. Show Answer Correct Answer: C) 2m3. 8. Why is a spectrum of seven colours formed when sunlight passes through a prism? A) White light is a mixture of seven colours. B) The different colours of light is reflected at different angles in a glass prism. C) The prism adds colour to the white sunlight. D) Light travels at high speed. Show Answer Correct Answer: B) The different colours of light is reflected at different angles in a glass prism. 9. According to the law of reflection the angle of incidence is A) Equal to the angle of relction. B) More than the angle of reflection. C) Less than the angle of reflection. D) None of above. Show Answer Correct Answer: A) Equal to the angle of relction. 10. When travelling home from school on the AT train at a constant speed in a straight line, which statement is true A) The driving force of the engine is bigger than friction and air resistance combined. B) There are no forces acting on the bus. C) The driving force of the engine is equal to friction and air resistance combined. D) A resultant force is required to keep the bus moving. Show Answer Correct Answer: C) The driving force of the engine is equal to friction and air resistance combined. 11. Acceleration is caused by a force acting on a mass. A) Newton's first law of motion. B) Newton's second law of motion. C) Newton's third law of motion. D) None of above. Show Answer Correct Answer: B) Newton's second law of motion. 12. The high pressure waves reflect as high pressure at the end of a ..... A) Closed pipe resonator. B) Open pipe resonator. C) Closed pipe harmonic. D) Open pipe harmonic. Show Answer Correct Answer: A) Closed pipe resonator. 13. Find the cut-off wavelength for the photoelectriceffect in tungsten (work function for tungsten is 4.5 eV) A) 138 nm. B) 414 nm. C) 552 nm. D) 276 nm. Show Answer Correct Answer: D) 276 nm. 14. Its is a branch of physics that applies the tools and techniques of physics to the study of living things in life processes. A) Atomic Physics. B) Electromagnetism. C) Thermodynamics. D) Biophysics. E) Relativity. Show Answer Correct Answer: D) Biophysics. 15. With increasing frequency, at what intervals are resonance lengths found in a closed pipe? A) Quarter wavelengths. B) Half wavelengths. C) Every wavelength. D) Double wavelengths. Show Answer Correct Answer: B) Half wavelengths. 16. Pressure applied to a fluid is transmitted unchanged throughout the fluid. A) Pascal's principle. B) Charles' law. C) Bernoulli's principle. D) Archimedes' principle. Show Answer Correct Answer: A) Pascal's principle. 17. The specific heat of platinum is 0.133 J/g$^ \circ$C . How much heat(Q) is released when a 10 g piece of platinum cools from 100$^ \circ$C to 50$^ \circ$C? A) 66.5 J. B) 665 J. C) 0.0266 J. D) 0.665 J . How much heat(Q) is released when a 10 g piece of platinum cools from 100$^ \circ$C to 50$^ \circ$C?. Show Answer Correct Answer: A) 66.5 J. 18. A 9 kg blob moving at 5 m/s to the right collides and sticks to a second blob with a mass of 5 kg moving at 2 m/s to the right. If the two bobs stick together, with what velocity will the two blobs move? A) 2.5 m/s. B) 3.9 m/s. C) 5 m/s. D) 2 m/s. Show Answer Correct Answer: B) 3.9 m/s. 19. The diameter of a proton is of the order of magnitude of A) 10-12m. B) 10-15m. C) 10-18m. D) 10-21m. Show Answer Correct Answer: B) 10-15m. 20. An atom of oxygen has 8 protons and 10 electrons, this means the atom is ..... A) Positively charged because it has excess electrons. B) Negatively charged because it has excess electrons. C) Positively charged because it has a deficiency of electrons. D) Negatively charged because it has a deficiency of electrons. Show Answer Correct Answer: B) Negatively charged because it has excess electrons. ← PreviousNext →Related QuizzesPhysics QuizzesScience 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