This quiz works best with JavaScript enabled. Home > Science > Physics > Physics Basics > Physics – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 7 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the two ways we can have UNBALANCED forces? A) 1) unequal forces in opposite directions and 2) forces in same direction. B) 1) forces in same direction and 2) equal forces in opposite direction. C) 1) unequal forces in opposite directions and 2) forces in opposite directions but same sizes. D) You can't have unbalanced forces, forces will always balance each other out. Show Answer Correct Answer: A) 1) unequal forces in opposite directions and 2) forces in same direction. 2. An electron is accelerated between anode and cathode through a potential difference 8000 V. What is the maximum speed of the electron? [ e =1.6 x 10-19 C and m= 9 x 10-31 ] A) 5.3 x 107 m s-1. B) 4.3 x 106 m s-1. C) 3.3 x 104 m s-1. D) 2.3 x 103 m s-1. Show Answer Correct Answer: A) 5.3 x 107 m s-1. 3. There are four main processes in changing of phase, and they are A) Melting. B) Boiling. C) Condensation. D) All the above. Show Answer Correct Answer: D) All the above. 4. Units of speed A) M. B) Km. C) M/s. D) J. Show Answer Correct Answer: C) M/s. 5. You drop a package from a plane flying at constant speed in a straight line. Without air resistance, the package will: A) Quickly lag behind the plane while falling. B) Remain vertically under the plane while falling. C) Move ahead of the plane while falling. D) Not fall at all. Show Answer Correct Answer: B) Remain vertically under the plane while falling. 6. What is the kinetic energy of a 5 kg object moving at 10 m/s? A) 50 J. B) 500 J. C) 250 J. D) 25 J. Show Answer Correct Answer: C) 250 J. 7. Two tyres of a tractor are very wide and huge because A) Pressure increase when area increases. B) Pressure reduces when area increases. C) None of the above. D) None of above. Show Answer Correct Answer: B) Pressure reduces when area increases. 8. A ALPHA PARTICLE IS DIVERTED TOWARD WEST IS DEFLECTED TOWARDS NORTH BY A FIELD . THE FIELD IS MAGNETIC . WHAT WILL BE THE DIRECTION OF FIELD? A) TOWARD SOUTH. B) TOWARD EAST. C) DOWNWARD. D) UPWARD. Show Answer Correct Answer: D) UPWARD. 9. Is directly proportional to work and inversely to time A) Energy. B) Power. C) Force. D) None of above. Show Answer Correct Answer: B) Power. 10. AS YOU MOVE AWAY FROM A CONVEX MIRROR, ITS IMAGE BECOME ..... AND MOVES TOWARD ..... A) SMALLER, INFINITY. B) SMALLER, FOCUS. C) ENLARGED, INFINITY. D) ENLARGED, FOCUS. Show Answer Correct Answer: B) SMALLER, FOCUS. 11. This energy is transferred through air particles. A) Chemical Energy. B) Sound Energy. C) Nuclear Energy. D) None of above. Show Answer Correct Answer: B) Sound Energy. 12. As a ray light ray travels from a less dense to a more dense optical medium (e.g. air to glass) A) The incident ray travels straight on. B) The incident ray bends away from the normal. C) The incident ray travels down the normal. D) The incident ray bends towards the normal. Show Answer Correct Answer: D) The incident ray bends towards the normal. 13. Dentist use to see an enlarged image of the teeth is ..... mirror A) Plane. B) Convex. C) Concave. D) None of these. Show Answer Correct Answer: C) Concave. 14. A sealed container of air is kept at a constant temperature. What will happen to the speed of the molecules of air in the container as time passes? A) The molecules will all reach the same speed. B) Some molecules will speed up and others will slow down, but the average speed will be constant. C) The molecules will slow down. D) There will be no change. Show Answer Correct Answer: B) Some molecules will speed up and others will slow down, but the average speed will be constant. 15. In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal? i. If the car is moving on a straight roadii. If the car is moving in circular pathiii. The pendulum is moving to and froiv. The earth is moving around the sun A) Only(ii). B) (i) and (iii). C) (ii) and (iv). D) Only (i). Show Answer Correct Answer: D) Only (i). 16. What is the base unit for measuring time? A) Days. B) Hours. C) Minutes. D) Seconds. Show Answer Correct Answer: A) Days. 17. A monochromatic light beam with a quantum energy of 9.0 eV is incident upon a photocell. The work function of the photocell is 4.1 eV. What is the maximum kinetic energy of the electron. A) 4.2 eV. B) 4.4 eV. C) 4.7 eV. D) 4.9 eV. Show Answer Correct Answer: D) 4.9 eV. 18. Physics has been around for ..... A) 100 years. B) 500 years. C) Several thousand years. D) None of above. Show Answer Correct Answer: C) Several thousand years. 19. Calculate 0.020 cm x 50 cm x 11.1 cm and give your answer with the correct number of significant figures. A) 10 cm3. B) 11.1 cm3. C) 11 cm3. D) 11. cm3. Show Answer Correct Answer: A) 10 cm3. 20. Solve and round accordingly. "730 / 1.89" A) 390. B) 386.243. C) 386. D) 386.24. Show Answer Correct Answer: A) 390. ← PreviousNext →Related QuizzesPhysics QuizzesScience QuizzesPhysics Quiz 1Physics Quiz 2Physics Quiz 3Physics Quiz 4Physics Quiz 5Physics Quiz 6Physics Quiz 8Physics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books