8/9/2019 Test in Physics (High School)

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Name: Year and Section

Fourth Grading Periodical Test in PhysicsDO NOT FORGET TO WRITE YOUR NAME. Shade the letter that corresponds to the BEST answer. Any numberwith any form of erasure will automatically be marked wrong.

1. What is the second event that happens during radio reception?

 A Demodulator separateselectronic AF signals fromcarrier RF waves

B  Amplifier boosts the weakelectronic AF signalretrieved from carrier waves

C Receiving antenna receivesbroadcasts from differentstations

D Tuner circuit filters theappropriate frequency fromtransmissions recieved

2.  All of the following are crucial parts of a nuclear fission reactorEXCEPT

 A moderator 

B water dam

C uranium fuel

D control rods

3. Of the units of radiation measurement, which is used to determine howmuch is absorbed by organs in the human body?

 A Gray

B Sievert

C Geiger 

D Becquerel

4. How much is the average energy yield of a single nuclear fusionreaction?

 A 200 MeV

B 3 to 18 eV

C 3 to 4 eV

D 3 to 18 MeV

5. The following are instruments for detecting or measuring radiationEXCEPT

 A Dosimeter 

B Geiger counter 

C Quality factor 

D Film badge

6. What is the function of a tuner circuit in a radio receiver set?

 A To receive theelectromagnetic wavestransmitted in air 

B To convert the electronicsignal to sound

C To amplify the receivedsignals

D To choose which signals toreceive

7. It is any beam of energy or energetic particles.

 A Radiation

B Isotopes

C Shielding

D Radioactivity

8. In which medium is sound unable to travel through?

 A Solid

B Vacuum

C Gas

D Liquid

9. What happens during the nuclear fission of Uranium?

 A Mass is conserved

B Energy is absorbed

C Energy is not conserved

D Energy is released

10. How is a nuclear fission chain reaction started?

 A release of tremendous

amount of energyB splitting of uranium nucleus

C bombardment of a neutron

D formation of Krypton andBarium

11. How much is the quality factor of apha radiation?

 A 2 to 5

B 5 to 10

C 20

D 1

12. It is the combination of two smaller nuclei to form a bigger nucleus.

 A Nuclear decay

B Nuclear reaction

C Nuclear fission

D Nuclear fusion

13. Which is the reason why nuclear fusion is a preferable electricityproducing process than nuclear fission?

 A Fusion operates at lowertemperatures than fission

B Fusion produces moreenergy than fission

C Fusion has less radioactivewastes than fission

D Fusion is more achievablein earth than fission

14. It is the common name of the isotope Hydrogen-3.

 A Deterium

B Hydronium

C Light Hydrogen

D Tritium

15. How much energy is released in a single nuclear fission reaction ofUranium?

 A 200 MeV

B 3 to 18 MeV

C 3 to 18 eV

D 3 to 4 eV

16. Which is a long term effect of radiation exposure?

 A Damage to lens of the eye

B Damage to digestive system

C Sores and burns to the skin

D Formation of canceroustumors

17. It is where nuclear fusion naturally occurs.

 A underground caves

B oceans

C stars

D earth's core

18. Which type of radiation is used in food irradiation?

 A Neutron

B  Alpha

C Gamma

D Beta

19. Which converts electronic AF signals into sound in radiocommunication?

 A Speaker 

B Microphone

C Demodulator 

D Modulator 

20. It sends the carrier RF waves to travel in air at nearly the speed of light.

 A Modulator 

B Receiving antenna

C Demodulator 

D Transmitting antenna

21. Which isotope is used in power plants to produce electricity? A Hydrogen 3

B Uranium 235

C Hydrogen 2

D Uranium 239

22. Given the same dose and time of exposure, which is the mostdamaging type of radiation?

 A  Alpha

B Beta

C Gamma

D Neutron

23.  All of the following are possible products of nuclear fission EXCEPT

 A Iodine

B Hydrogen

C Barium

D Krypton

24.  All of the following are agricultural uses of radiation EXCEPT

 A Mutant plant breeding

B Radioactive dating

C Food irradiation

D Sterile insect technology

25. It is an application of radioactivity in which a substance in injected intoa patient's body for diagnosis purposes.

 A Radioactive dating

B Radiation therapy

C Food irradiation

D Radioisotopic tracing

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8/9/2019 Test in Physics (High School)

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Fourth Grading Periodical Test in Physics

26. Why should the antenna of a receiving unit be oriented perpendicularto the direction of the transmitted carrier RF waves?

 A so that the received carrierRF waves are tunedproperly

B because carrier RF wavesare transverse in nature

C so that there are nointerference from otherstations

D because carrier RF wavesare longitudinal in nature

27. In order to determine the age of the Earth, boulders and rocks, which

isotope is used? A Carbon 14

B Uranium 239

C Cobalt 60

D Iodine 131

28. How would a sound wave with bigger amplitude compare to a soundwave with smaller amplitude?

 A It would be fainter (less loud)

B It would be at a higher pitch

C It would be louder

D It would be at a lower pitch

29. Which aspect of sound waves determine the pitch of a note playedfrom a musical instrument?

 A TimbreB Speed

C FrequencyD  Amplitude

30. Which is NOT a possible product of fusion of hydrogen nuclei?

 A Hydrogen 3

B Helium 3

C Helium 4

D Uranium 235

31. Which of the following are requirements for nuclear fusion to occur?

 A Low temperature andneutron bombardment

B High temperature and

confinement

C High temperature andneutron bombardment

D Low temperature and

confinement

32. Which electromagnetic wave is usually used in media broadcasting?

 A Radio waves

B Gamma rays

C Microwave

D Light

33. Which of following radiation is most penetrating?

 A X-rays

B  Apha

C Beta

D Gamma

34. Which of the following is NOT a unit of radiation measurement?

 AGray

B Sievert

CGeiger 

D Becquerel

35. The mass-energy equivalence formula.

 A E = mc2

B E = m/c

C E = m2c

D E = mc

36. It is a device that combines the electronic AF signal formed from themicrophone with the carrier RF waves.

 A Receiving antenna

B Demodulator 

C Transmitting antenna

D Modulator 

37. Which of the following is the BEST definition of radio communication? A It is a method of

communication betweenradios.

B It is a method ofcommunication using radios.

C It is a method ofcommunication usingelectromagnetic waves.

D It is a method ofcommunication using thepropagation of sound in air.

38. What is the speed of sound in air at 200 C temperature and 1 atmpressure?

 A 241 m/s

B 300 m/s

C 343 m/s

D 300 000 000 m/s

39. It is the amount of mass that is missing in a nuclear fission or nuclearfusion reaction.

 A Fission mass

B Fusion mass

C Mass defect

D Nuclear mass40. What is the hearing range of the human ear?

 A 20 Hz to 20 000 Hz

B 2 Hz to 2000 Hz

C 200 Hz to 200 000 Hz

D 20 Hz to 2000 Hz

41.  All of the following factors are considered in radiation exposurereduction EXCEPT

 A Time

B Distance

C  Age

D Shielding

42. Radio communication consists of radio transmission and radio

reception. Which of the following is NOT part of transmission? A Modulator 

B Speaker 

C Microphone

D Transmitting antenna

43. Which is the correct description of the type of wave that sound is?

 A Mechanical and transverse

B Non-mechanical andlongitudinal

C Non-mechanical andtransverse

D Mechanical and longitudinal

44. Which of the following devices produces carrier RF waves in radiocommunication?

 A Modulator B Oscillator 

C Tuner CircuitD Demodulator 

45. What are the beneficial uses of Iodine-131 and Cobalt-60 isotopes?

 A Food irradiation

B Radioactive dating

C Radioisotopic tracing

D Radiation therapy

46. What makes music from a violin sound different from music from apiano?

 A Timbre

B Frequency

C Speed

D  Amplitude

47. It is the process that takes pace at the core of the sun.

 A Nuclear fusion

B Nuclear fission

C Nuclear reaction

D Nuclear decay

48. Who discovered the formula that enables us to calculate how muchenergy is released during a fusion or fission reaction?

 A  Albert Einstein

B Pierre Curie

C Marie Curie

D Henri Becquerel

49. Which of the following is true of nuclear fission and nuclear fusionreactions?

 A Nuclear fission is harder toachieve than nuclear fusion

B Nuclear fusion producesmore radioactive wastesthan nuclear fission perreaction

C Nuclear fission producesmore energy than nuclearfusion per reaction

D Nuclear fusion is morecommonly used in powerplants than nuclear fission

50. Which of the following organs are MOST sensitive to radiation?

 A Breast

B Thyroid

C Gonads

D Lungs

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