This quiz works best with JavaScript enabled. Home > Science > Physics > Physics – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Physics Quiz 31 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Frequency is A) Amount of time it takes for one wavelength. B) How many wavelengths are completed in one second. C) Distance between two crests or two troughs. D) Amount of energy in a wave. Show Answer Correct Answer: B) How many wavelengths are completed in one second. 2. The size of the image is always smaller than the object in A) Plane mirror. B) Silver mirror. C) Concave mirror. D) Convex mirror. Show Answer Correct Answer: D) Convex mirror. 3. A bike travels at a constant speed of 4 m/s for 5 seconds. How far does it go? A) 4 m. B) 10 m. C) 20 m. D) 1.5 m. Show Answer Correct Answer: C) 20 m. 4. Pushing on a wall is an example of which law of motion? A) First. B) Second. C) Third. D) Fourth. Show Answer Correct Answer: C) Third. 5. The horizontal number line in a graph A) Line graph. B) Pie graph. C) X-axis. D) Y-axes. Show Answer Correct Answer: C) X-axis. 6. A small steel ball is dropped from a low balcony. Ignoring air resistance, which statement describes its motion? A) It falls with decreasing acceleration. B) It falls with constant acceleration. C) It falls with decreasing speed. D) It falls with constant speed. Show Answer Correct Answer: B) It falls with constant acceleration. 7. The science of Physics is concerned with which of the following matters? A) Applying physics principles. B) Describing the physical world. C) Making predictions about a broad range of phenomena. D) All of these. Show Answer Correct Answer: D) All of these. 8. Lognitudinal waves and Transverse waves are types of? A) Mechanical waves. B) Non-Mechanical waves. C) Both of above. D) None of Above. Show Answer Correct Answer: A) Mechanical waves. 9. It is any number that is used to describe physical phenomenon quantitatively. A) Base quantity. B) Physical quantity. C) Derived quantity. D) Scalar quantity. Show Answer Correct Answer: B) Physical quantity. 10. What happens when two polarizing filters are placed so that their axes of polarization are perpendicular to each other? A) Transmitted light is slightly weaker. B) There is no transmitted light. C) Transmitted light is polarized. D) Transmitted light oscillates in all directions. Show Answer Correct Answer: A) Transmitted light is slightly weaker. 11. Which of the statements is NOT correct about pressure? A) Pressure acts in all directions. B) Pressure does not depend on the density of liquid. C) Pressure does not depend on the shape of the container. D) Atmospheric pressure is greater at sea level. Show Answer Correct Answer: B) Pressure does not depend on the density of liquid. 12. Fire in the diesel engine is produces by which of the following? . A) Friction. B) Spark plug. C) Self starter. D) Compression. Show Answer Correct Answer: D) Compression. 13. How many cubic centimeters are there in a cubic meter? A) 0.1. B) 1. C) 102. D) 106. Show Answer Correct Answer: D) 106. 14. The smallest marked division in the measuring instrument A) Uncertain digits. B) Least count. C) Unit equality. D) Dimensional analysis. Show Answer Correct Answer: B) Least count. 15. The mass of an object is measured on Earth. The mass is 5.0kg. The object is taken to the Moon. The mass of the object is measured on the Moon. What is the mass of the object on the Moon? A) A 0 kg. B) B more than 0kg, but less than 5.0kg. C) C 5.0 kg. D) D more than 5.0kg. Show Answer Correct Answer: C) C 5.0 kg. 16. The critical angle of water when the refracted angle is 900 and refractive index of water and air is 1.33 and is A) 48.80. B) 49.10. C) 500. D) 510. Show Answer Correct Answer: B) 49.10. 17. A closed loop through which charges can continuously move. A) Electric circuit. B) Electric current. C) Resistance. D) Ohm's Law. Show Answer Correct Answer: A) Electric circuit. 18. Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings. " A) Stefan's Law. B) Doppler's Effect. C) Kirchhoff's Law. D) Newton's law of cooling. Show Answer Correct Answer: D) Newton's law of cooling. 19. One should not connect a number of electrical appliances to the same power socket because A) The appliance will not get full voltage. B) This can damage the electrical meter. C) This can damage the appliances due to overloading. D) This can damage the domestic wiring due to overloading. Show Answer Correct Answer: D) This can damage the domestic wiring due to overloading. 20. Heat is simply another word for A) Temperature. B) Thermal energy. C) Thermal energy that flows from hot to cold. D) Radiant energy. Show Answer Correct Answer: C) Thermal energy that flows from hot to cold. ← 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