SECOND PERIODICAL TEST IN SCIENCE 10
NAME: ____________________________ GR.& SEC._________ SCORE:________
Directions: Choose the letter of the correct answer. Write your answers in the blank before the
number..
_____1. What type of electromagnetic waves is used in radar?
A. Infrared rays
C. Radio waves
B. Microwaves
D. Ultra-violet rays
_____2. Which electromagnetic wave carries more energy than the others?
A. Microwaves
C. UV radiation
B. Infrared
D. Visible light
_____3. A type of EM wave that is for medical use, to help doctors look inside the body to diagnose
bone fractures and tumors.
A. Gamma rays
C. Microwaves
B. X-rays
D. Infrared
_____4. This EM wave are very strong that can kill living cells, and are used to treat cancer through
the process called radiotherapy.
A. Gamma rays
C. Microwaves
B. X-rays
D. Infrared
_____5. What type of EM wave that is used in remote control of TV, video, cassette recorders, and
other electronic appliances?
A. Microwaves
C. UV radiation
B. Infrared
D. Visible light
_____6. Electromagnetic waves are produced by __________
A. current
C. any disturbance
B. voltage source
D. vibrating charge
_____7. Which of the following forms of electromagnetic waves is used mostly in communication?
A. X-ray
C. Radio wave
B. Infrared
D. Gamma rays
_____8. In the electromagnetic wave, the direction of the propagation of the wave is __________.
A. always to the right.
B. cannot be determined.
C. parallel to electric and magnetic field direction.
D. perpendicular to the electric and magnetic field direction.
_____9. Which of the following forms of electromagnetic waves has the widest frequency range?
A. x-ray
C. ultraviolet
B. microwave
D. radio waves
_____10. What happens to the frequency of the electromagnetic wave if its wavelength increases?
A. decreases
B. increases as well
C. remains the same
D. cannot tell; frequency and wavelength are two different concepts
_____11. What EM wave make cellular telephones transmit and receive signals?
A. radio waves
C. visible light
B. microwaves
D. gamma rays
_____12. All of the following are uses of visible light. Which one is not?
A. it enables us to see things
B. gives light to the screen of our devices
C. for thermal imaging
D. used in optical fibers
_____13. Which kind of wave is use in night vision goggles?
A. microwave
C. gamma ray
B. infrared
D. visible light
_____14. Which of the following EM wave makes use of artificial lighting?
A. visible spectrum
C. gamma rays
B. x-ray
D. infrared
_____15. Which of the following is a use of ultraviolet radiation?
A. diagnosing bone fracture
B. identifying original from fake banknotes
C. night vision goggle
D. optical fiber
_____16. Which type of X-ray can penetrate even through metals?
A. regular X-ray
C. short wavelength X-ray
B. long wavelength X-ray
D. dental X-ray
_____17. What imaging technique uses powerful magnets, computer and radio waves to make
detailed pictures inside your body?
A. thermal imaging
C. Magnetic Resonance Imaging (MRI)
B. infrared imaging
D. X-ray image
_____18. In an infrared camera, what color indicates warmer temperature?
A. blue
C. violet
B. green
D. yellow
_____19. Which of the EM waves below are emitted by stars and some radioactive substances?
A. gamma rays
C. microwave
B. radio waves
D. X-ray
_____20. Which kind of wave causes the fluorescent chemicals to glow in sunlight?
A. microwave
C. gamma ray
B. ultraviolet
D. visible light
_____21. Convex mirrors produce _______________ images.
A. only virtual images
C. only real images
B. virtual or real images
D. inverted images
_____22. In ray diagramming, an incident ray that is parallel to the principal axis _____________.
A. will reflect parallel to the principal axis
B. will reflect through the center of the curvature
C. will refract through the focal point
D. will continue along the same path through the lens
_____23. If the angle of incidence is 10 degrees from the normal line, what is the angle of reflection
and the total angle between the incident and reflected ray?
A. Angle of reflection = 30
C. Angle of reflection = 10
Total angle = 60
Total angle = 20
B. Angle of reflection = 40
D. Angle of reflection = 20
Total angle = 20
Total angle = 10
_____24. A ray that shows the direction that light travels after it has crossed over the boundary.
A. Refracted Ray
C. angle ray
B. Incident Ray
D. Normal Ray
_____25. The bending of light as it passes from one transparent substances into another
A. Reflection
C. Refraction
B. Focal
D. Vertex, V
_____26. The geometric center of the lens
A. Focus, F
C. Ray
B. Focal length
D. Vertex, V
_____27. What happens to the light rays that pass through a convex lens?
A.All the light rays diverge
B. All the light rays converge
C.All the light rays are absorbed by the lens
D.Some light rays diverge, and some light rays converge
_____28. Describe the image that is produced by a concave lens.
A. It is upright and larger than the object
B. It is upright and smaller than the object
C. It is upside down and larger than the object
D. It is upside down and smaller than the object
_____29. A concave lens reflects light rays
A. Towards the normal
B. Away from the normal
C. Along the normal
D. None of the above
_____30. A concave lens reflects light rays
A. Towards the normal
C. Along the normal
B. Away from the normal
D. None of the above
_____31. What property of light is illustrated in a periscope?
A. Reflection
C. Diffraction
B. Refraction
D. Interference
_____32. If you stand in front of two plane mirrors at 800 at each other, how many images will you
see?
A. 3
B. 5
C. 7
D. 11
_____33. A light ray traveling parallel to a concave mirror’s axis, strikes to the mirror’s surface. What
is the direction of the reflected ray?
A. it passes through the mirror’s focal point. To the mirror’s axis.
B. It travels again parallel
C. It travels at right angles to the mirror’s axis.
D. It passes through the mirror’s center of curvature.
_____34. What kind of mirror is used by department store to give a wider area and smaller image of
the shoppers/buyers?
A. Plane mirror
C. Concave mirror
B. convex mirror
D. None of the above
_____35. Where can you find a convex lens in a telescope with a very long focal length?
A. at the eyepiece lens
C. at the stand
B. at the objective lens
D. anywhere
_____36. Where can you find a convex lens with a very short focal length in a microscope?
A. at the eyepiece lens
C. at the stand
B. at the objective lens
D. anywhere
_____37. What optical device is found in a periscope?
A. concave lens
C. Concave mirror
B. convex mirror
D. Plane mirror
_____38. What tool is used by astronomers to see faraway objects?
A. Camera
C. Periscope
B. Microscope
D. Telescope
_____39. What optical device uses two convex lenses with short focal length?
A. Camera
C. Periscope
B. Microscope
D. Spectroscope
_____40. What device is a used for recording visual images in the form of photographs, film, or video
signals?
A. Camera
C. Mirror
B. Lens
D. Telescope
_____41. The region around the bar magnet is called
A. Magnetic flux
C. north pole
B. Magnetic field
D. south pole
_____42. Where is the direction of the magnetic field in the
illustration?
A. From south to north
B. From north to south
C. Anywhere in the pole
D. From east to west
_____43. What is represented by the magnetic field lines in the illustration?
A. Magnetic flux
C. attractive force
B. Magnetic poles
D. repulsive force
_____44. Which of the following are the essential parts in a simple
electric motor?
A. Magnet
C. armature
B. Dry cell
D. all of the above
_____45. Where is the direction of the force (F) experienced by the
armature when the direction of current (I)flow is towards the page
of this module?
A. Downward
C. to South
B. To North
D. upward
_____46. What will happen to the current-carrying coil of wire inside the magnetic field of the
permanent magnet in the diagram of a simple electric motor?
A. Current-carrying wire will not move
B. Current- carrying wire will not rotate because it will not interact with the magnetic field of
the permanent magnet.
C. Current – carrying wire will rotate because it will interact with the magnetic field of the
permanent magnet.
D. Both A and B choices
_____47. In the diagram of a simple electric motor, the current-carrying wire is parallel to the
magnetic field of the magnet. What is the magnitude of the magnetic force experienced by the wire?
A. Zero
C. minimum
B. Maximum
D. both A and B
_____48. When the current-carrying wire is perpendicular to the magnetic field of the permanent
magnet, what is the magnitude of the magnetic force (F) experienced by the wire?
A. Zero
C. minimum
B. Maximum
D. both A and B
_____49. In the diagram of a simple electric motor, will the rotation of the currentcarrying wire called
armature continue if the battery is removed?
A. Yes, because the magnetic field of the magnet will continue pushing the wire
B. No, because the wire will lose its magnetic field and the interaction between the wire and
the magnet will stop
C. Yes, because the effect of force on the wire will not stop
D. Both A and B
_____50. Which of the following appliances has electric motor component in doing its tasks?
A. Electric drill machine
C. electric fan
B. Drone
D. all of the choices
_____51. What energy input is needed by electric motors to continue giving mechanical energy as the
output?
A. Heat energy
C. chemical energy
B. Electrical energy
D. kinetic energy
_____52. What device induces current by changing the magnetic field of the magnet through the
process called electro-electromagnetic induction?
A. Electric generator
C. dry cell
B. Electric motor
D. solar cells
_____53. Which of the following are factors that affect the amount of induced current in electric
generators?
A. The length of the conducting wire that make up the armature of the generator
B. The strength of magnetic field of the magnet
C. The velocities of the conducting wire and the magnetic field
D. All of the choices
_____54. What are essential parts of the electric motor and generator?
A. magnetic field
C. input energy
B. conducting wire
D. all of the choices
_____55. What makes the electric motor and generator identical?
A. The action of an electric motor is just a reverse of a generator.
B. Generator and electric motor used the same current
C. Generator and electric motor do not need magnetic field to function
D. All of the choices
_____56. Which of the devices below can be used to detect aircrafts and ships?
A. RADAR
C. GPS
B. MRI
D. communication tower
_____57. What device uses thermal imaging technology to capture the light being emitted as heat by
objects in the field of view?
A. infrared camera
C. fluorescent
B. remote control
D. night vision goggles
_____58. Which of the EM waves below is used to remove most forms of microbiological
contamination from water?
A. infrared rays
C. radio waves
B. microwaves
D. ultraviolet rays
_____59. All of the following are dangerous waves when taken by the body in large amounts except
one. Which is it?
A. radio waves
C. ultraviolet
B. gamma rays
D. x-rays
_____60. How does the energy level changes from gamma ray to radio wave?
A. increases
C. cannot be determined
B. decreases
D. energy level does not change