Name: _____________________
Section: _________
Score: ________
Multiple Choices
Directions: Write the letter of the correct answer before the number.
1. Cellular phone is a vey sophisticated device because it transmit and receives radio waves?
a. True
b. False
c. Maybe
d. Sometime
2. Ultraviolet rays are used to sterilize drinking water.
a. True
b. False
c. Maybe
d. Sometime
3. It provides energy in the synthesis of Vitamin D.
a. Gamma ray
b. X-ray
c. Ultraviolet Ray
d. Infrared
4. It transmits EMW and then reflected by objects that are hit by the waves, then the transmitter-receiver
calculates the time difference of transmission and detection to located object.
a. RADAR
b. SONAR
c signal
d. submarine
5. It is the process of encoding information to radio waves to transmit information.
a. Translation
b. Transcription
c. Insertion
d. Modulation
6. Rainbow is formed when lights is _______ then ________ by the water droplets in the air.
a. refracted, diffracted b. reflected, refracted c. reflected, diffracted d. none of the choices
7. The use of ______ allows UV inks to glow which are hidden in the bill that aids in identifying fake bills.
a. gamma ray
b. infrared
c. ultraviolet rays
d. microwave
8. The deflection of the galvanometer indicate that there is current generated, electrons are forced to move through
the copper wire, and the coil of copper wire induces magnetism.
a. True
b. False
c. Maybe
d. Sometime
9. If you are standing between two plane mirrors that are oriented in 90 degrees angle, how many images of you will
form?
a. 2
b. 3
c. 4
d. 5
10. It converts electric energy to mechanical, uses electricity to facilitate rotation, and contain electromagnets that
causes rotation of motors.
a. generators b. electric motors
c. motorcycle
d. magnets
11. _________ is used to detect very slight current produced by a moving magnetic field in a coil of copper wire.
a. ammeter
b. voltmeter
c. galvanometer
d. ohmmeter
12. which of the following does not convert mechanical to electric energy?
a. electric generator
b. electric motor
c. solar panels d. hydroelectric power plants
13. Which of the following should not be used in determining the direction of magnetic field in straight current
currying wires?
a. use of right-hand rule
c. the direction of the current is pointed by the thumb?
b. use of left-hand rule
d. the direction of the magnetic field is pointed by four fingers
14. Magnetic field is stronger near the poles of the magnet because there is greater amount of flux lines near the pole
a. True
b. False
c. Maybe
d. Sometime
15. It is a type of temporary magnet made from a coil of copper wire wound around an iron core with current flowing
to it.
a. electromagnet
b. AlNiCo
c. bar magnet
d. permanent magnet
16. _______________ lens is used to correct myopia while _________ lens is used to correct hyperopia.
a. convex; concave
b. concave; convex
c. plane; convex
d. plane; concave
17. What is the LOST of an image if an object placed between the front of concave mirror and its focal point?
a. front of mirror, inverted, enlarged, real
c. behind the mirror, inverted, enlarged, virtual
b. front of mirror, inverted, reduced, real
d. behind the mirror, erect or upright, enlarged, virtual
18. An orange is placed 8cm in front of concave mirror with a focal length of 8cm. Where is the location of image?
a. front of mirror
b. behind the mirror
c. between C and F
d. no image is formed
19. In the visible spectrum, which color has the shortest frequency but longest wavelength?
a. red
b. blue
c. yellow
d. violet
20. In a simple electric motor, to make the motor turn faster, you have to _______ the current.
a. increase
b. decrease
c. remains the same
d. none of the choices
21. This electromagnetic wave is used detect heat signatures of living organisms.
a. UV rays
b. Infrared
c. Gamma Ray
d. Radio wave
22. What is the wavelength of EMW with a frequency of 3.00x1010 Hz
a. 0.33 x10-2 m
b. 1.00 x10-2 m
c. of 3.00x10-2 m
d of 3.00x108 m
23. Which electromagnetic energy carries more energy?
a. Infrared
b. microwaves
c. Radio waves
d. visible lights