Republic of the PhilippinesDepartment of Education

Region IV-A CALABARZONCITY SCHOOLS DIVISION OF BACOOR

Bacoor City, Cavite

SCIENCE 10SECOND QUARTERLY EXAMINATION

Name: ________________________________ Score: _______________________Level & Section: _______________________ Date: ________________________ Instructions:

Choose the letter of the best answer. Begin Here

1. What do you call the device that detect and convert audio inputs to electric outputs?A. studio monitorB. audio interface

C. cableD. transducer

2. What is the nature of the force responsible in the operation of a DC motor?A. electricalB. magnetic

C. gravitationalD. electrical and magnetic

3. Electromagnetic induction describes the ______________________.A. effect of heat on a magnetic fieldB. effect of heat on a moving conductorC. effect of a conductor moving in a magnetic fieldD. effect of magnetic field on a stationary conductor

4. Which of the following is true about a magnet that is broken into two pieces?A. Both pieces are as magnetic as the original magnet.B. Both magnets are stronger than the original magnet.C. Both magnets will have a north pole and a south pole.D. One of the pieces is a north pole and the other is a south pole.

5. Permanent magnets are magnets ________________________A. that can be regulatedB. natural stones dug from the Earth

C. whose magnetism had been inducedD. made from alloys of cobalt and nickel

6. Which of the following is nonmagnetic material?A. cobalt B. glass C. nickel D. steel

7. All magnets can have ______________________.A. two N-seeking polesB. two S-seeking poles

C. an E-seeking pole or W-seeking polesD. only a N-seeking and a S-seeking pole

8. In a bar magnet, ______________________.A. only the two poles are magnetizedB. the whole bar magnet is magnetized

C. only the N-seeking pole is magnetizedD. only the S-seeking pole is magnetized

9. The force of repulsion or attraction between two poles depends mainly on ______________.A. strength of the polesB. kind of metal is the magnet

C. permanence of the magnetD. the distance between the poles

10. The N-pole and the S-pole ____________________.A. attract each otherB. push against each otherC. are neutral with each otherD. have something to do with the nature of a magnet

11. What will happen to a permanent magnet if it is dropped too often?A. Magnet will lose its magnetism.B. Magnet will be magnetized.

C. Magnetic domain will be disturbed.D. Magnetic domain will not be disturbed.

12. Which is TRUE among these statements?I. Two positive charges repel each other.II. Two negative charges attract each other.III. A positive charge and a negative charge attract each other.

A. I and II only B. II and III only

C. I and III only D. I, II, and III

13. The magnetic field is _________________________________.A. the place where no object may be influenced by a magnetB. the region in space marked by visible magnetic lines of forceC. that space near a magnet where only another magnet may be affectedD. the area where a magnet can influence other magnets or other magnetizable metals

14. The ability of a substance to attract the magnetic flux from other materials is described as its ____________.A. accountabilityB. penetrability

C. permeabilityD. transparency

15. The number of the magnetic lines of force is called ______________________.A. the magnetic fluxB. its magnetic strength

C. magnetic lines of forceD. the magnetic force

16. Which of the following statements is false?A. A wire carrying an electric current can affect a compass.B. A wire coil carrying an electric current is an electromagnet.C. A wire coil carrying an electric current is a permanent magnet.D. A wire coil carrying an electric current can produce a magnetic field.

17. The direction of the magnetic field at a given point is the direction the ________________.A. left side of the needle when placed at that pointB. right side of the needle when placed at that pointC. N pole of a compass needle when placed at that pointD. S pole of a compass needle when placed at that point

18. Lines of flux from a magnet ______________________.A. start from N pole and flow toward the S poleB. start from the S pole and flow in all directionsC. start from the S pole and flow toward the N poleD. start from the N pole and flow in all directions within the magnetic field

19. Who discovered that a changing magnetic field generates electricity? A. Hans Christian Oersted B. Michael Faraday C. George Simon Ohm D. Heinrich Hertz

20. Which will NOT affect the amount of induced current when a magnetic field and a conductor are in relative motion?

A. their relative velocityB. the strength of the magnetic field C. the length of the conductor D. the direction of the magnetic field

21. The magnetic field in a magnet is produced by ______________________.A. the moving electrons in a magnetB. the transfer of protons from one end to the other end of a magnetC. the neutrons moving out of the nuclei of the atoms in the magnetD. some other forces in the magnet aide from the electrons, protons, and nuclei.

22. In order for electrons to move through a conductor, ______________________.A. an emf must be appliedB. heat must be applied on the conductorC. the conductor must be cooled below some room temperatureD. there is no need to do anything, the electrons will move by themselves

23. What is produced by the rapid changes of the electric field?A. currentB. electromagnets

C. magnetic fieldD. voltage

24. What law tells us that the direction of the current opposes whatever action responsible for its production?A. Faraday’s LawB. Lenz’s Law

C. Ampere’s LawD. Law of Conservation of Energy

25. Which of the following is increased or decreased in a transformer?A. currentB. energy

C. magnetic fieldD. voltage

26. What does a changing magnetic field in a coil of wire produce?A. An induced powerB. An induced voltageC. An induced resistanceD. An induced coil polarity

27. A bar magnet is passed through a coil of wire. In which case would the induced current in the coil of wire greatest? A. When the magnet moves slowly so that it is inside the coil for a long time. B. When the magnet moves fast so that it is inside the coil for a short time.

C. When the north pole of the magnet enters the coil first. D. When the south pole of the magnet enters the coil first.

28. Which of the following methods will result to an induced current in a loop of wire?I. Moving a magnet into the loop of wireII. Moving the loop of wire into a magnetIII. Placing the loop near a wire where an alternate current is flowing

A. I and IIB. II and III

C. I and IIID. I, II and III

29. Which statement is NOT TRUE about Lenz’ law?A. The induced current in a conductor also sets up its own magnetic field.B. It can be used to determine the direction of the induced current in a conductor. C. An induced voltage gives rise to a current whose magnetic field opposes the change in magnetic flux that produced it.D. An induced voltage gives rise to a current whose magnetic field is in the same direction as the change in magnetic flux that produced it.

30. When does electromagnetic induction occur in a coil of wire?A. When there is a change in electric field.B. When there is a change in magnetic field.C. When there is a change in the voltage of the coil.D. When there is a change in the polarity of the coil.

31. In which of the following cases is voltage induced in a wire?I. Moving the wire near a magnetII. Moving a magnet near a wireIII. Changing the current in the nearby wire

A. I onlyB. II only

C. I and IID. I, II and III

32. Several paper clips dangle from the north pole of a magnet. What is the induced pole in the bottom of the lowermost paper clip?

A. North poleB. South poleC. North or South poleD. Cannot be determined

33. When is current produced in an electromagnetic induction? A. conductor moves across a magnetic field B. the length of the conductor is increased C. the strength of the magnetic field D. magnetic field does not move with respect to a stationary conductor field does not change34. He demonstrated the magnetic effect based on the direction of current.

A. André-Marie AmpereB. Michael Faraday

C. James Clerk MaxwellD. Heinrich Hertz

35. He contributed in developing equations that showed the relationship of electricity and magnetism.A. André-Marie AmpereB. Michael Faraday

C. James Clerk MaxwellD. Heinrich Hertz

36. He showed experimental evidence of electromagnetic waves and their link to light.A. André-Marie AmpereB. Michael Faraday

C. James Clerk Maxwell D. Heinrich Hertz

37. He formulated the principle behind electromagnetic induction.A. André-Marie AmpereB. Michael Faraday

C. James Clerk Maxwell D. Heinrich Hertz

38. Which of the following statements is/are TRUE?I. All EM waves have the same speedII. All EM waves travel at the speed of light.III. As wavelength of EM wave decreases, the frequency of the wave increases.IV. As frequency of the wave increases, energy of the wave also increases.

A. I onlyB. I and II

C. I, II and III D. I, II, III and IV

39. A certain radio station broadcasts at a frequency of 675 kHz. What is the wavelength of the radio waves?A. 280 mB. 324 m

C. 400 mD. 444 m

40. Which two waves lie at the ends of the visible spectrum?A. Infrared and Ultraviolet raysB. Infrared and Ultraviolet rays

C. Radio waves and MicrowavesD. X-rays and Gamma rays

41. In the visible spectrum, which color has the longest wavelength? A. Blue B. Green

C. Red D. Violet

42. Which property spells the difference between infra-red and ultra-violet radiation?A. ColorB. Speed in vacuum

C. WavelengthD. none of the above

43. What type of electromagnetic waves is used in radar?A. Infrared raysB. Microwaves

C. Radio wavesD. Ultraviolet rays

44. Which electromagnetic wave carries more energy than the others?A. microwavesB. radio waves

C. UV radiationD. visible light

45. How does the audio signal of television networks transmitted?A. By modulating the frequency of the waveB. By modulating the amplitude of the wave

C. By transforming it to an analog signalD. By transforming it to a digital signal

46. What is the type of electromagnetic wave used in texting?A. radio wavesB. microwaves

C. ultraviolet raysD. X-rays

47. What is the type of electromagnetic wave used in checking bankbook signature?A. radio wavesB. microwaves

C. ultraviolet raysD. X-rays

48. A ray of light falls on a mirror at an angle of 280 with the surface. The angle at which light is reflected isA. 280

B. 140 C. 620

D. 560

49. A concave lens, like a convex mirror __________________________________.A. gives only a reduced imageB. does not produce a real imageC. produces only enlarge imagesD. produces only an inverted image

50. A man is 1.4 m tall. What is the minimum size of plane mirror he needs to see his full self?A. 1.4 mB. 0.7 m

C. greater than 1.4 mD. The size depends on his distance from mirror

55. If you look at the pool of still water, your face is clearly seen. Which of the following best explains this?A. Scattering of light in different directionsB. Regular reflection of light by the surface of still waterC. Irregular reflection of light by the surface of still waterD. Light is reflected from the surface of still water in different directions

56. The filament in an automobile headlight radiates light that is reflected from a converging mirror. The reflected rays form a parallel beam of light because the filament is placed ______________________.

A. at the principal focusB. at the center of curvature

C. beyond the center of curvatureD. between the mirror and the principal focus

57. A ray of light strikes a plane mirror at an angle of equal to 300. What is the angle of reflection?A. 300

B. 600C. 900

D. 1200

For 58-60, refer to the information below:A 0.20 m tall object was placed 0.15 m in front of a concave mirror. The image is formed 0.30 m also in front of the mirror.

58. The focal length of the mirror is __________.A. 0.10 mB. 0.45 m

C. -0.10 mD. -0.45 m

59. The image is _______________.A. real and erectB. real and inverted

C. virtual and erectD. virtual and inverted

60. The height of the image is ______________.A. 0. 10 mB. 0. 20 m

C. 0.30 mD. 0.40 m

61. An object is located 20 mm in front of a mirror, and its image is 40 mm in front of the mirror. What is the focal length of the mirror?

A. -13 mmB. -40 mm

C. 13 mmD. 40 mm

62. An object is located 20 cm in front of a concave mirror whose radius of curvature is 20 cm. The image of the object is _______________________________________________.

A. real, inverted, and bigger than the objectB. real, inverted, and same size as the object

C. real, inverted, and smaller than the objectD. virtual, upright, and smaller than the object

63. A curved piece of glass or other transparent material that is used to refract light is called a/an___________.A. mirrorB. lens

C. reflectorD. optical fiber

64. Parallel light rays emerged through a concave lens. What kind of image is produced?A. No imageB. Only a real image

C. Only a virtual imageD. Both real and virtual image

65. A lens produces a real image by causing light rays from a common point to _________________________.A. reflect constructivelyB. converge and intersect at a point

C. disperse into different wavelengthD. diverge and appear to come from a point

For 66-68, refer to the diagram below:

66. How far is the image from the mirror?A. 0.10 mB. 0.20 m

C. 0.30 mD. 0.40 m

67. At what distance from the mirror should an object be placed to produce a virtual image?A. 0.05 mB. 0.10 m

C. 0.30 mD. 0.50 m

68. As the object is moved from C to F, the size of the image _______________.A. decreasesB. increases

C. is unaffectedD. none of these

69. What type of lens is a magnifying glass? A. Concave

B. Plano-Concave C. Plane Glass D. Convex

70. How will you describe the image formed by a concave lens if the object is placed at 2F?A. Real, inverted and same heightB. No image is formed

C. Virtual, erect and magnifiedD. Real, inverted and reduced

71. How will you describe the image formed by a concave lens if the object in front of F?A. Real, inverted and same heightB. No image is formed

C. Virtual, erect and magnifiedD. Real, inverted and reduced

72. How will you describe the image formed by a concave lens if the object is placed at F?A. Real, inverted and same heightB. No image is formed

C. Virtual, erect and magnifiedD. Real, inverted and reduced

73. A ray of light passes through three parallel slabs of different indices of refraction as shown. If θi is 300, what is the angle the emerging ray makes with the normal?

A. 300

B. 600

C. 900

D. Not enough information

74. Which of the following can produce an upright image that is smaller than the object?A. concave mirror and concave lensB. concave mirror and convex lens

C. convex mirror and convex lensD. convex mirror and concave lens

75. The optical instrument that works like a human eye is the __________________.A. cameraB. hand lens

C. microscopeD. telescope

0.10 m

Concave mirror

ObjectPrincipal

axis C F

Prepared by:

Mylha H. BaltazarScience 10 TeacherBNHS-Tabing Dagat Annex

Submitted by:

Mr. Ponciano G. GarridoHead Teacher VI-ScienceOfficer-In-Charge, BNHS-Tabing Dagat Annex

Dr. Anita M. RomPrincipal IV

Submitted to:

Helen A. GutierrezEPS-Science

Noted by:

Dr. Editha B. GregorioOIC- Chief in Curriculum Implementation Division

Approved by:

Dr. Ruth L. FuentesSchools Division Superintendent

Key to Correction:

1.D2.D3.C4.C5.D6.B7.D8.B9.A10.A11.A AND C12.C13.D14.C15.A AND C16.C17.C18.A19.B20.D21.A22.A23.C24.B25.D26.B27.B28.D29.D30.B31.D32.A33.A34.A35.C36.D37.B38.D39.D40.D41.C42.C43.B44.C45.A46.B47.C48.C49.A50.B51.A52.D

53.A54.A55.B56.A57.B58.A59.B60.D61.C62.B63.B64.C65.B66.B67.A68.B69.D70.A71.C72.B73.A74.D75.A