FOURTH WRITTEN TEST IN SCIENCE 9
QUARTER 4, SY 2021-2022
Instructions: Read each question carefully and write the correct answer on a
separate sheet of paper, or the answer sheet provided to you. Do not write anything
on this test questionnaire.
1. Who among the following scientists discovered the relationship between
electricity and magnetism?
A. Michael Faraday
B. Alessandro Volta
C. Andrei Marie Ampere
D. Hans Christian Oersted
2. Transformers are used to raise the voltage along with substations and lower
for its residential consumption. What kind of transformers are used to raise
voltage?
A. Step-up
B. Step-down
C. Both 1 and 2
D. Neither of the two
3. In which of the following units is electrical consumption measured by
electric companies for our household consumption in our homes?
A. Volt
B. Kilowatt
C. Megawatt
D. Kilowatt-hour
4. A generator is a machine that converts energy for transmission and
distribution over power lines to domestic, commercial, and industrial
customers. What energy transformation takes place in a generator?
A. Heat to mechanical
B. Mechanical to electrical
C. Chemical to mechanical
D. Electrical to mechanical
5. When a magnet and the conductor move relative to each other, what is being
produced?
A. Voltage
B. Current
C. Resistance
D. Magnetic field
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
6. When power reaches the distribution lines, the step-down transformer
reduced further the voltage to 220 to 230 volts for household consumption.
What will happen to an appliance labeled with 110-volt if it is plugged directly
into our sockets?
A. It will burn or explode due to excess voltage or emf
B. It will function but will not last long because the voltage is not
compatible.
C. Its voltage will automatically change according to the voltage in the
power supply.
D. It will work properly since the voltage indicated in an appliance is not
associated with the voltage in the power supply
7. Energy Efficiency Ratio (EEF) tells you how efficiently a refrigerator uses its
power to cool its rated storage volume. How is EEF related to operating costs?
A. The lower the EEF, the lower the operating cost.
B. The lower the EEF, the higher the operating cost.
C. The higher the EEF, the lower the operating cost.
D. The higher the EEF, the higher the operating cost.
8. Which of the following describes a changing magnetic field for a generator to
produce electric current?
A. Both the magnet and the electric conductor should be steady.
B. Either the magnet or the electric conductor should be moving.
C. Both the magnet and the electric conductor should be moving.
D. Current is induced whether the magnet and the electric conductor are
steady or moving.
9. Which of the following distinguishes a distribution from a transmission
circuit?
A. Voltage level
B. The size of the transformer
C. Amount of the current induced
D. The kind of distribution wires used
10. You made an electric motor in school. When you tested it by using 4 dry
cells, the armature turned very fast. What should you do to make it turn
slower?
A. Use a bigger magnet.
B. Remove one of the dry cells.
C. Increase the number of turns in the coil of wire.
D. Decrease the distance between the magnetic poles.
11. If a 100 W light bulb is lit for 8 hours each day for 20 days in a month, how
many kilowatt-hours will the bulb consume?
A. 16
B. 160
C. 1600
D. 16000
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
12. Mr. Simbajon’s electric meter reads 8765 kWh last month. How much will he
pay for the power generation if the charge of the electric company per kWh is
P6.88 and his electric meter this month reads 9975?
A. P 1,210.00
B. P 3,457.42
C. P 8,324.80
D. P 8,756.00
13. A 60-watt bulb is connected to a 120V plug. What is the current in the lighted
bulb?
A. 0.25 A
B. 0.5 A
C. 2.0 A
D. 4.0 A
14. Ana turned on a lamp switch in her room. Which of the following is the correct
path of electrical power that can be traced back to the source?
A. power plant transmission substations distribution substations
residences
B. transmission substations power plants residences
distribution substations
C. residences distribution substations power plants
transmission substations
D. distribution substations transmission substations power plants
residences
15. Which of the following gives the correct order in the process of making energy?
1. Steam turns the turbine.
2. Generator makes electricity.
3. Turbine turns the Generator.
4. Fuel is burned and heats water turning it to steam.
A. 4, 1, 2, 3
B. 4, 1, 3, 2
C. 3, 1, 4, 2
D. 1, 4, 3, 2
16. In thermal power stations, coal is used for the generation of electricity. The
heat energy produced due to the combustion of coal converts water into
steam. How does energy change from one form to another before it is
transformed into electrical energy?
A. Mechanical Energy → Electrical Energy → Heat Energy
B. Mechanical Energy → Heat Energy → Electrical Energy
C. Heat Energy → Mechanical Energy → Electrical Energy
D. Heat Energy → Electrical Energy → Mechanical Energy
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
17. In electric power plants, turbines are connected to generators to convert
mechanical energy to electricity. How do turbines produce electricity?
A. Turbines propel magnets to create a magnetic field and produce voltage
B. Turbines rotate and produce a force that moves both magnets and coils
of wire
C. Turbines are attached to coils of wires and stationary magnets to create
steady magnetic field
D. Turbines either powered by steam or water spin huge magnets inside
coils of copper wire to induce current
18. How would you explain why electrical power is transmitted over long
transmission lines at very high voltages and low current?
A. To make energy content constant
B. To maximize the energy loss
C. To minimize the energy loss
D. To preserve energy
19. Hydroelectric power plant is a major source of electric current in some places
in our country. It is considered almost 100% efficient because it produces little
waste heat. Which of the following could be the reason why our country cannot
depend on this type of power plant?
A. Our country has no adequate source of funds
B. Bodies of water in the country are not sufficient
C. There is not enough ideal locations for dams to store large quantities
of water
D. It produces a large number of pollutants that could contaminate our
environment
20. In typical power transmission, alternating current (AC) is used instead of
direct current (DC) in transmitting electricity through long distances. Which
of the following explains this?
A. Only alternating current can flow through the cables.
B. Most of the electrical appliances work only with alternating current.
C. Alternating current voltage can be stepped up or stepped down by
using transformers.
D. Generating direct current is more complicated than generating
alternating current.
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
21. The illustration below shows some parts of an electrical power grid. Which of
the following is NOT true about the generation, transmission, and distribution
of electricity?
Figure 1. Electric Power Grid
(Source: https://www.e-education.psu.edu/eme801/node/529)
A. Power plants are generating stations of electricity
B. Generating stations could be hydropower, geothermal, nuclear, or
fossil fuels
C. From power plants, electricity is transmitted through wires to a step-
down transformer to increase the voltage
D. In substations, voltage is reduced before it is transmitted to
distribution lines and finally to consumers.
22. A certain ancestral village is situated in a spot where it could be an ideal
location for building a dam to generate hydropower. The owners are against it
because they would like to preserve the cultural and historical heritage of their
ancestors and elders. As a CEO of a multimillionaire company, how will you
convince them that constructing this power plant is a big help to the
community?
A. Offer them a huge amount of money and lifetime comfort and
convenience
B. Persuade them that the tradition they kept is not as vital as living
a luxurious life
C. Tell them that they will be hailed heroes for helping augment the
economic condition of the community.
D. Present the project and explain to them that many would benefit
from it and that the village will still be protected and well-
maintained
23. Ms. Jamero would like to study the feasibility of energy resources that do not
produce a lot of pollutants that could destroy the environment. Which of the
following should he NOT visit?
A. In a place where it is abundant with coal, oil, and natural gas
B. In a site where geysers and hot springs are located
C. In a mountainous area probable for hydropower
D. In a town where the wind is significantly abundant
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
24. Gemma wanted to improve the lighting condition of her room by buying a
lamp. Which of the following suggestion is best for her?
A. Buy an incandescent bulb because it is cheaper.
B. Buy an incandescent bulb because it gives off more light.
C. Buy a fluorescent lamp because it is brighter than an incandescent
bulb.
D. Buy a compact fluorescent lamp (CFL) or LED lamp because it is
more energy efficient
25. Energy resources like water, coal, and natural gas will become scarce when
they are expended faster than they can recover. Human activities such as
deforestation, over mining, and destruction of the ecosystems are just some of
the causes of this dilemma. To help address this problem, which of the
following activities will you exercise to help preserve and conserve these energy
resources?
A. Utilize more products from fossil fuels.
B. Refrain from joining activities such as reforestation.
C. Practice reducing, reusing, and recycling materials.
D. Support mining industries in restricted areas to boost the economy of
our locality.
Test Developer: Domingo Daryl G. Simbajon/Merasol M. Jamero DepEd-Caraga
School: Agusan National High School Sukdanan
Email Address: domingo.simbajon001@deped.gov.ph Standardized Assessment
merasoljamero@deped.gov.ph
