Download BANKAL NATIONAL HIGH SCHOOL Bankal, Lapu

BANKAL NATIONAL HIGH SCHOOL
Bankal, Lapu-Lapu City
FOURTH PERIODICAL EXAMINATION IN PHYSICS
Name: __________________________________ Yr. & Sec._____________ Date: _________ Score:_____
I. Direction: Read the questions carefully. Encircle the letter of your answer. No erasures.
1. Which of the following can be a medium for a wave? A. air
b. water
c. space
d. all of them
2. A medium transfers ______
a. air
b. matter
c. energy
d. molecules
3. The maximum distance the molecules of a medium are displaced from their rest position is
a. speed
b. frequency
c. amplitude
d. wavelength
4. A large ripple tank wit a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50 cm.
What is the velocity of the wave?
A. 60cm/s
b. 5/3 c,/s
c. 750 cm/s
d. 1500 cm/s
5. Which of the following is an example of longitudinal wave?
a. blue light
b. radio waves
c. water ripple
d. sound waves
6. The bending of waves around the edge of a barrier is called
a. reflection
b. refraction
c. diffraction
d. interference
7. The higher the frequency of the waves is
a. the lower is its speed
c. the longer is its period
b. the greater is its amplitude d. the shorter is its wavelength
8. Which of the following waves are used in communication?
a. X-ray
b. infrared
c. radio
d. gamma
9. In the vacuum, the speed of electromagnetic waves is ______
a. zero b. changing depending on its value of wavelength c. always the same as speed of light d. None of the these
10. In the EM wave, the direction of the propagation of the wave is ______
a. always to the right
b. parallel to electric and magnetic field
c. perpendicular to the electric and magnetic field
d. cannot be determined
11. Which of the following EM waves has the highest frequency?
A. X-ray
b. microwave
c. radio d. ultraviolet
12. What happens to the frequency of the wave if the wavelength increases?
a. decreases b. remains the same c. increases d. cannot tell, frequency and wavelength are two different concepts
13. Which of the following EM wave is used in cancer treatment? A. ultraviolet b. gamma
c. infrared
d. radio
14. Which of the following has the shortest wavelength? A. x-ray
b. gamma
c. microwave
d. infrared
15. Which of the following energy transformation occur at the receiving station?
a. sound to electrical b. Electromagnetic to sound c. Electrical to electromagnetic d. electromagnetic to electrical
16. The shattering of a wine glass by an opera singer’s voice is a demonstration of
a. resonance
b. beats
c. echo
d. interference
17. Which of the following is not a characteristic of sound? A. loudness
b. frequency
c. timbre
d. wavelength
18. Sound waves do not travel through_____ a. gase
b. solid
c. liquid
d. vacuum
19. What do sound and light have in common?
a. they both travel in vacuum
b. they have similar wavelength a.
c. they both obey the law of reflection
d. they both travel as longitudinal wave
20. Vibrations inside the ear are amplified by three bones. What are the names of these three tiny bones?
a. hammer, anvil, pinna
b. hammer, cochlea, stirrup
c. hammer, anvil, stirrup
d. cochlea, anvil, stirrup
21. Which of the following statements about sound is correct?
a. Sound waves cannot travel through solid
b. Sound waves travel faster in solid than in gases
c. Sound waves travel faster in gases than in solid
d. The speed of sound is not affected by the medium
22. Reverberations in halls and assembly halls are prevented with the use of sound absorbent materials such as ____
a. glass and shiny wood
b. curtains and foams
c. smooth concrete walls
d. curtains and shiny wood
23. What was the first electronic device?
a. computer
b. telephone c. telegraph d. wireless telegraph
24. Who invented the telephone? A. Alexander Graham Bell b. Lee De Forest c. Samuel Morse d. Thomas Edison
25. Vacuum tubes were first used in telephone so that long distance communication is possible. What is its function?
a. Amplify signals b. generates electrical signal c. generate carrier frequency d. convert sound to electrical signal
26. Which of the following is the use of telegraph?
a. It uses radio waves to send messages
C. It uses a special code to send messages
b. It replaces the function of a vacuum tube
d. It converts sound energy to electrical energy and back to sound
27. Which of the following s the unit of sound intensity? A. Bel
b. Farad
c. Hertz
d. Ohm
28. Which of the following has the lowest pitch?
A. Re
b. Me
c. Fa
d. Ti
29. Which frequency is not audible to human ear?
A. 50 Hz
b. 500 Hz
c. 5000 Hz
d. 50,000 Hz
30.What refers to the method of detecting the presence, position, direction of motion of distant objects by reflecting a
beam of sound waves? A. CRO
b. MIR
C. RADAR
d. SONAR
The figure below shows a wave. Refer to this figure for questions 31-33
31. The amplitude of the wave is _____ a. 0.5 m
b. 1.0 m
c. 1.5 m
d. 3.0 m
32. The wavelength of the wave is
a. 0.5 m
b. 1.0 m
c. 1.5 m
d. 3.0 m
33. If the frequency of the wave is 2 Hz. What is its speed?
a. 6 m/s
b. 1.5 m/s
c. 0.66 m/s
d. cannot be determined
34. Electromagnetic waves are considered as _____
a. electric waves
b. longitudinal waves
c. transverse waves
d. mechanical waves
35. A decibel is a measure of the _____ of a sound.
a. speed
b. wavelength
c. loudness
d. pitch
36. Which of the following statements is true?
a. sound waves can travel faster in cold air
b. sound waves can interfere with one another such that no sound is heard
c. sound waves can travel in air, water, solids and in vacuum
d. the speed of sound depends on its frequency
37-39 Arrange the energy transformation in the transmitter circuit. Numbers them 1-3
_____ Sound
_______ electrical energy
______ mechanical energy of the vibrating diaphragm
40. What part of the telephone is a receiver?
a. mouthpiece
b. earpiece
c. ringer
d. touch pad
II. Match the contributors in the development of Telephone in column A to its contribution in Column B
A
___ 1. Keck, Maurer, and Sckultz
___2. Thomas Edison
___3. Christian Oersted
___4. James Clerk Maxwell
___5. Michael Faraday
___6. Lee De Forest
___7. Shockley, Bardeen, and Brattain
___8. Henrich Hertz
___9. Joseph Henry
___10. Guglelmo Marconi
B
a. produced the first optical fiber
b. discovered electromagnets
c. showed electromagnetism can be used in communication
d. developed the solid state transistor
e. demonstrated experimentally the existence of EM waves
f. built the triode
g. devised the telephone’s carbon transmitter
h. discovered electromagnetic induction
i. used EM waves to send messages
j. hypothesized the existence of EM waves