Tiêu đề PHYSICS_OPTICS & RELATIVITY_Mock Exam.pdf ✅

1. 6. What happens to parallel light rays coming from the left, and then traveling through a diverging lens? a. They are directed through the focal point to the left of the lens. b. They bend away from the center of the lens, appearing to have come from the focal point to the left of the lens. c. They bend towards the center of the lens, traveling through the focal point to the right of the lens. d. They bend away from the center of the lens, appearing to have come from the focal point to the right of the lens. 7. Placing a glass lens in oil will: a. increase the focal length of the lens relative to air. b. decrease the focal length of the lens relative to air. c. have no effect on the focal length; the focal length is a property of the lens material. d. increase the focal length because the wavelength of the light is increased. 8. To increase the diameter of an aluminum ring from 50.0 mm to 50.1 mm, the temperature must increase by 80°C. What temperature change would be necessary to increase the diameter from 100.0 mm to 100.1 mm? a. 20°C b. 40°C c. 80°C d. 160°C 9. A gas is enclosed in a metal container with a movable piston on top. Heat is added to the gas by placing a candle flame in contact with the container’s bottom. Which of the following is true about the temperature of the gas? a. The temperature must go up if the piston remains stationary. b. The temperature must go up if the piston is pulled out dramatically. c. The temperature must go up no matter what happens to the piston. d. The temperature must go down no matter what happens to the piston. This mock exam was prepared by the UP Pre-Medical Honor Society for those who availed of the NMAT 2025 Review packages. Do not reproduce, distribute, or share this material outside of the intended recipients. Any form of plagiarism or academic dishonesty will carry consequences.
10. An engine uses a pan of 100°C boiling water as the high temperature reservoir and the atmosphere as the low temperature reservoir. In ideal behavior, how much more efficient is the engine on a cold, 0°C day than on a warm, 20°C day? a. 1.2 times as efficient b. 2 times as efficient c. Infinitely more efficient d. Just as efficient 11. Which of the following lists types of electromagnetic radiation in order from least to greatest energy per photon? a. Ultraviolet, infrared, red, green, violet b. Red, green, violet, infrared, ultraviolet c. Infrared, red, green, violet, ultraviolet d. Ultraviolet, violet, green, red, infrared 12. What is the energy of a photon whose wavelength is 2.07 nm? a. 60 eV b. 600 eV c. 960 eV d. 9600 eV 13. What is the de Broglie wavelength of a proton whose linear momentum has a magnitude of 3.3 × 10−23 kg·m/s? a. 0.002 nm b. 0.02 nm c. 0.2 nm d. 2 nm 14. The single electron in an atom has an energy of –40 eV when in the ground state. The first excited state is at –10 eV. What happens if the atom is struck by photons of 15 eV? a. The electron will absorb the energy of one photon and become excited halfway to the first excited state, then quickly return to the ground state, without emitting a photon. b. The electron will absorb the energy of one photon and become excited halfway to the first excited state, then quickly absorb the energy of another photon to reach the first excited state. c. The electron will absorb two photons and be excited to the first excited state. d. Nothing will happen. 15. What would happen to the energy of a photon if its wavelength were reduced by a factor of 2? a. It would decrease by a factor of 4. b. It would decrease by a factor of 2. c. It would increase by a factor of 2. d. It would increase by a factor of 2h. This mock exam was prepared by the UP Pre-Medical Honor Society for those who availed of the NMAT 2025 Review packages. Do not reproduce, distribute, or share this material outside of the intended recipients. Any form of plagiarism or academic dishonesty will carry consequences.
16. A person sips a drink through a straw. At which of the following positions is the pressure lowest? I. Inside the person’s mouth II. At the surface of the drink III. At the bottom of the drink a. Only at position I b. Only at position II c. Only at position III d. Both at positions I and II 17. A talk show host inhales helium; as a result, the pitch of his voice rises. What happens to the standing waves in his vocal cords to cause this effect? a. The wavelength of these waves increases. b. The wavelength of these waves decreases. c. The speed of these waves increases. d. The frequency of these waves decreases. 18. What happens to the photoelectric effect when the intensity of light is increased? a. The stopping potential increases since there is more energy b. The stopping potential decreases since there is more energy c. The photocurrent increases since there are more photons d. The work function decreases since there is more energy 19. Monochromatic light passes through a double slit and produces an interference pattern on a screen 2.0 m away. The third-order maximum is located 1.5 cm from the central maximum. Which of the following adjustments would cause the third-order maximum to be located 3.0 cm away instead? a. Doubling the distance between slits b. Tripling the wavelength of the light c. Using a screen 1.0 m away from the slits d. Using a screen 3.0 m away from the slits e. Halving the distance between slits 20. What conservation laws govern Compton scattering? a. Conservation of energy and angular momentum b. Conservation of energy and linear momentum c. Conservation of linear and angular momentum d. Conservation of kinetic energy and momentum 21. In a vacuum space, what is the speed of the UV rays? a. 3 x 108 m/s b. 400 nm/s c. Approximately zero d. Not enough information This mock exam was prepared by the UP Pre-Medical Honor Society for those who availed of the NMAT 2025 Review packages. Do not reproduce, distribute, or share this material outside of the intended recipients. Any form of plagiarism or academic dishonesty will carry consequences.