Question 1

What kind of mirror is used in the side mirrors of automobiles and trucks to give the driver a wider area and smaller image of traffic behind him?

Accepted Answer

B. Convex mirror

Answer

D. A Lens

Answer

A. Plane mirror

Answer

C. Concave mirror

Question 2

Which of the following is NOT a distinguishing feature of an electric generator?

Accepted Answer

B. It converts electrical energy into mechanical energy.

Answer

D. It is based on the principle of electromagnetic induction.

Answer

C. It generates electricity.

Answer

A. It converts mechanical energy into electrical energy.

Question 3

Which of the following principles explain how an electric motor works?

Accepted Answer

D. electromagnetism

Answer

B. magnetism

Answer

C. electrolysis

Answer

A. magnetic force

Question 4

What do you call an energy converting system that transforms electrical energy into mechanical movement?

Accepted Answer

A. electric motor

Answer

D. electric plasma

Answer

B. electric field

Answer

C. electric generator

Question 5

The diagram represents the position of the crests of waves 6 seconds after a stone is thrown into a pool of still water. Which of the following are the correct speed (v) and frequency (f) of the waves?

Accepted Answer

D. v = 1.5 m/s; f = 0.5 Hz

Answer

A. v = 1.5 Hz; f = 0.5 m/s

Answer

C. v = 0.5 m/s; f = 1.5 Hz

Answer

B. v = 6 Hz = 2 m/s

Question 6

Calculate the frequency of an electromagnetic wave with a wavelength of 8.7 x 10-7meters. Determine which of the types of electromagnetic wave has the same wavelength and frequency.

Accepted Answer

A. 3.4 x 10^14, Visible

Answer

C. 5.0 x 10^ 16, X-ray

Answer

B. 4.5 x 10^ 15, Ultraviolet

Answer

D. 6.4 x 10^18, Gamma ray

Question 7

Telecommunication uses electromagnetic waves that have long wavelengths due to their desirable propagation properties. Using the wavelength range below, which among the types of electromagnetic waves is most suited for telecommunication use?

Accepted Answer

D. Visible light

Answer

A. Infrared

Answer

C. Radio waves

Answer

B. Gamma ray

Question 8

You saw your friend, Anna, video chatting her mother who is working overseas. While on the phone, which of the following types of electromagnetic radiation is Anna being exposed to and from what source?

Accepted Answer

B. II, III and IV

Answer

A. I, II and III

Answer

C. III, IV and V

Answer

D. V only

Question 9

Explain how X-radiation can be harmful and how it can be a useful diagnostic tool.

Accepted Answer

B. Overexposure to X-rays can cause cancer, though in limited doses X-rays can be used for imaging internal body parts.

Answer

A. Overexposure to X-rays can cause HIV, though normal levels of X-rays can be used for sterilizing needles.

Answer

D. Overexposure to X-rays causes cancer, though normal levels of X-rays can be used for reducing cholesterol in the blood.

Answer

C. Overexposure to X-rays causes diabetes, though normal levels of X-rays can be used for imaging internal body parts.

Question 10

Using the image below, how would the value of the angle of reflection (Angle F) be determine using a protractor?

Accepted Answer

D. Position the center of the protractor where the light ray hits the mirror, the zero mark of the protractor is positioned at the normal line and determine the angle measurement from the normal line (Line A) to the reflected ray (Line C)

Answer

A. Position the center of the protractor where the light ray hits the mirror, the zero mark of the protractor is positioned at the mirror line right of the normal line and determine the angle measurement from the mirror to the reflected ray (Line C)

Answer

C. Position the center of the protractor where the light ray hits the mirror, the zero mark of the protractor is positioned at the mirror line left of the normal line and determine the angle measurement from the mirror to the reflected ray (Line C)

Answer

B. Position the center of the protractor where the light ray hits the mirror, the zero mark of the protractor is positioned at the incident ray and determine the angle measurement from the incident ray (Line B) to the reflected ray (Line C)

Question 11

In reference to the same image in item number10, the law of reflection states that:

Accepted Answer

D. Angle E = Angle F

Answer

A. Line A = Line B

Answer

B. Line A = Line C

Answer

C. Angle D = Angle G

Question 12

Light travels from air into an optical fiber with an index of refraction of 1.44. In which direction does the light bend? If the angle of incidence on the end of the fiber is 22o, what is the angle of refraction inside the fiber?

Accepted Answer

C. Toward the normal, 15o

Answer

D. Toward the normal, 25o

Answer

B. Away from the normal, 25o

Answer

A. Away from the normal, 15o

Question 13

You wanted to get a wider view of a place and observe larger things on a smaller scale. Which of the following mirrors should you use?

Accepted Answer

B. Convex mirror

Answer

A. Concave mirror

Answer

C. Double concave mirror

Answer

D. Plane mirror

Question 14

You are task to view an image of an object that is enlarged, virtual and upright. Which of the following instruments should you use?

Accepted Answer

B. Compound Microscope

Answer

A. Camera

Answer

C. Double concave mirror

Answer

D. Plane mirror

Question 15

Which is the correct sequence in the operation of generator in the production of electricity in hydroelectric power plant?

Accepted Answer

B. II, I, IV, III

Answer

C. IV, I, III, II

Answer

A. I, IV, II, III

Answer

D. III, II, IV, I

Question 16

Which is the correct sequence in the operation of a simple motor?

Accepted Answer

A. III, V, I, II, IV

Answer

C. IV, I, II, V, III

Answer

B. III, V, IV, I, II

Answer

D. V, IV, III, II, I

Question 17

One summer day, you are invited by your friends to join them on beach party. While on the beach, the sun is shining brightly. Which of the following will you most probably experience right after the beach party if you spend long period under the sun enjoying your activities? What could cause, and how would avoid, such possible danger?

Accepted Answer

D, Sunburn due to over exposure in UV rays present in sunlight, wear a sunscreen with high sun protection factor (SPF)

Answer

B. Blindness due extreme brightness of sunlight, were tinted goggles

Answer

A. Acute radiation syndrome (ARS) due to extreme heat, be near to a portable air conditioning unit all the time

Answer

C. Cancer due to gamma rays in the sunlight, wear thick radiation protective equipment while on the beach

Question 18

Given an object placed in front of a concave mirror as in the figure below, predict the qualitative characteristics of the image formed in terms of size, location, type, and orientation.

Accepted Answer

C. The image is enlarged, located behind the mirror, virtual and upright

Answer

A. The image is enlarged, located between F and 2F, real and inverted

Answer

B. The image is enlarged, located beyond 2F, real and upright

Answer

D. The image is reduced, located behind the mirror, virtual and inverted

Question 19

Given an object placed in front of a biconvex lens an in the figure below, predict the qualitative characteristics of the image formed in terms of size, location, type, and orientation.

Accepted Answer

C. The image is reduced, located between the mirror and F at the opposite side of the lens, real and upright

Answer

D. The image is reduced, located between F and 2F at the opposite side of the lens, real and upright

Answer

A. The image is enlarged, located between the mirror and F at the opposite side of the lens, real and upright

Answer

B. The image is enlarged, located between F and 2F at the opposite side of the lens, real and upright

Question 20

40. Which of the following characteristics are correct descriptions of an image formed by the concave side of the spoon when the object is an arm-length away?

Accepted Answer

D. upside down and smaller

Answer

C. upright and smaller

Answer

A. upright and bigger

Answer

B. upside down and bigger

Question 21

The following diagrams represent four types of electromagnetic waves. Which of the four represents the electromagnetic wave with the shortest wavelength?

Accepted Answer

B.
B

Answer

A.
A

Answer

D.
D

Answer

C.
C

Question 22

Which of the following correctly lists electromagnetic waves in increasing order of wavelength (λ), frequency (f) and energy (E)?

Accepted Answer

B. (λ) Gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave (f) Radio wave, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray (E) Radio wave, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray

Answer

A. (λ) Gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave (f) Gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave (E) Radio wave, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray

Answer

C. (λ) Radio wave, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray(f) Gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave (E) Gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave

Answer

D. (λ) Radio wave, infrared, microwave, visible light, x-ray ultraviolet, gamma ray (f) Gamma ray, visible light, x-ray, ultraviolet, radio wave, infrared, microwave (E) Gamma ray, infrared, x-ray, visible light, ultraviolet, microwave, radio wave

Question 23

A student makes the following statements about microwaves and radio waves. Which of these statements is/are correct?

Accepted Answer

A.
I only

Answer

B.
II only

Answer

C. III only

Answer

D. I, II, and III

Question 24

All the following made use of gamma rays except one. Which is it?

Accepted Answer

C. sterilization of water in drinking fountains

Answer

B. treating cancer through the process called radiotherapy

Answer

D. sterilization of medical equipment

Answer

A. treating tumors

Question 25

Which of the following devices is designed to produce electromagnetic radiation with the longest wavelength to operate?

Accepted Answer

D. FM radio transmitter.

Answer

C. x-ray microscope

Answer

A. Light bulb

Answer

B. microwave oven

Question 26

All the following are practical applications of electromagnetic waves, which of them is/are radio waves not used for?

Accepted Answer

A. I only

Answer

C. I, II and III

Answer

D. II, III and IV

Answer

B. I and II

Question 27

Despite being the tiniest portion of the electromagnetic spectrum, visible light, provides the most important use among plants and to all other organisms that depend on them. Which of the following biological process is this use of the visible spectrum referring to?

Accepted Answer

C. Photosynthesis

Answer

B. Lighting

Answer

A. Cameras and Lenses

Answer

D. Vision

Question 28

All of the following are uses of visible light. Which one is not?

Accepted Answer

C. for thermal imaging

Answer

B. gives light to the screen of our devices

Answer

A. it enables us to see things

Answer

D. used in optical fibers

Question 29

Which of the following graphs best represents the relationship between frequency and wavelength of electromagnetic waves?

Accepted Answer

A. 1

Answer

D. 4

Answer

B. 2

Answer

C. 3

Question 30

Which insect, important for pollination and food production, was observed to acquire colony collapse disorder (CCD) when it is near to cell phone towers??

Accepted Answer

B. Bees

Answer

A. Ants

Answer

D. Termites

Answer

C. Grasshoppers

Question 31

Which is not caused by radio waves?

Accepted Answer

B. Migraine

Answer

D. Internal heating of body tissue

Answer

C. Harm body cells

Answer

A. Headache

Question 32

The law of reflection holds true for which of the types of reflective surfaces?

Accepted Answer

B. II only

Answer

D. I, II and III

Answer

C. III only

Answer

A. I only

Question 33

Which of the following is the angle of incidence (θi) in the following image?

Accepted Answer

B. Angle E

Answer

A. Angle D

Answer

C. Angle F

Answer

D. Angle G

Question 34

Which of the following are the best descriptions of the images formed in a plane mirror?

Accepted Answer

C. Virtual and Erect

Answer

B. Real and Inverted

Answer

A. Real and Erect

Answer

D. Virtual and Inverted

Question 35

At which location in front of a concave mirror should an object be placed to create an image that is enlarged, upright and virtual?

Accepted Answer

D. Between F and the Mirror

Answer

A. At 2F/C

Answer

B. Between 2F/C and F

Answer

C. At F

Question 36

Which of the following are the best characteristics of an image formed in a concave mirror if an object is placed beyond 2F or the center of curvature?

Accepted Answer

C. Reduced, real and inverted

Answer

B. Enlarged, real and upright

Answer

A. Enlarge, real and inverted

Answer

D. Reduced, real and upright

Question 37

Which of the following best describes an image of an object that is placed on the focal point in front of a biconvex lens?

Accepted Answer

D. There is no image

Answer

B. Enlarged, virtual, and upright 2

Answer

A. Enlarged, virtual and inverted

Answer

C. Reduced, real and inverted

Question 38

Which of the following best describes an image of an object that is placed in front of a biconcave lens?

Accepted Answer

B. Reduced, virtual, and upright

Answer

D. Reduced, real and upright

Answer

C. Reduced, real and inverted

Answer

A. Reduced, virtual and inverted

Question 39

To correct nearsightedness, a person is prescribed with what kind of lenses?

Accepted Answer

Diverging lens

Answer

Converging lens

Answer

None of the above.

Answer

Focusing lens

Question 40

Which mirror concept explains why the word AMBULANCE is written in reverse in an ambulance car?

Accepted Answer

B. Multiple Image

Answer

A. Lateral Inversion

Answer

D. Virtual image

Answer

C. Real image

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