Science5_Q3_Mod7_ver3.pdf

5
Science
Quarter 3 - Module 7
Electromagnet
Department of Education ● Republic of the Philippines

Science- Grade 5
Alternative Delivery Mode
Quarter 3 - Module 7: Electromagnet
First Edition, 2020
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Published by the Department of Education – Division of Ozamiz City
Division Superintendent: Jean G. Veloso, CESO VI
Development Team of the Module
Author/s: Lilibeth C. Revelo, Mary Ethel S. Ratilla
Reviewers: Crisfer A. Alfanta, Renato D. Cagbabanua, Menerva D. Barola,
Jed Mae F. Coronel and Marexelle Ruth P. Sanduan
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Schools Division Superintendent
Co-Chairpersons: Audie S. Borres, CESE
Assistant Schools Division Superintendent
Members: Anacleta A. Gacasan-CID Chief
Jed Mae F. Coronel, EPS-Science
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Science
Quarter 3 – Module 7
Electromagnet
This instructional material was collaboratively developed and reviewed
by educators from public and private schools, colleges, and or/universities. We
encourage teachers and other education stakeholders to email their feedback,
comments, and recommendations to the Department of Education at action@
deped.gov.ph.
We value your feedback and recommendations.
Department of Education ● Republic of the Philippines
5

Table of Contents
What This Module is About………………………………………………………………………………..i
What I Need to Know …..………………………………………………………………….i
How to Learn from this Module…………………………………………………………………………...ii
Icons of this Module………………………………………………………………………………………...iii
What I know………..………………………………………………………………………………………..iv
Lesson 1:
Constructing an Electromagnet
What I Need to Know ....................................................................... 1
What’s In ....................................................................................... 1
What’s New...................................................................................... 1
What Is It ......................................................................................... 2
What’s More .................................................................................... 2
What I Have Learned ...................................................................... 3
What I Can Do ................................................................................. 3
Lesson 2:
Designing an Experiment to Determine the Strength of Electromagnet
What’s In ....................................................................................... 4
What’s New...................................................................................... 4
What Is It ......................................................................................... 4
What’s More .................................................................................... 5
What I Can Do ................................................................................. 6
Lesson 3:
Determining the Factors that Affect the Strength of an Electromagnet
What’s In ....................................................................................... 7
What’s New...................................................................................... 7
What Is It ......................................................................................... 8
What’s More .................................................................................... 8
What I Can Do ................................................................................. 9

Lesson 4:
The Importance of Magnet in Our Daily Life
What’s In ....................................................................................... 10
What’s New...................................................................................... 10
What Is It ......................................................................................... 11
What’s More .................................................................................... 11
What I Can Do ................................................................................. 12
Summary ........................................................................................................... 12
Assessment: (Post-Test).................................................................................. 13
Key to Answers................................................................................................. 14
References ........................................................................................................ 16

i
What This Module is About
Electricity and magnets are closely related to each other. Electricity can
produce magnets while magnets can produce electricity.
How is this made possible? In this module you will learn how electricity can be
made to produce magnets.
This module includes lessons such as:
Lesson 1: Constructing an Electromagnet
Lesson 2: Designing an Experiment to Determine the Strength in an
Electromagnet
Lesson 3: Determining Factors that Affect the Strength of an Electromagnet
Lesson 4: The Importance of Magnet in Our Daily Life
What I Need to Know
At the end of this module, the students should be able to:
1. construct an electromagnet
2. infer that electricity can produce magnetism
3. identify the parts of an electromagnet
4. design an experiment to determine the strength of an electromagnet
5. determine the factors that affect the strength of an electromagnet
6. tell the importance of electromagnets in our daily life
Photo Credit: Exploring and Protecting Our World by
Coronel, Carmelita C. et.al pp. 215

ii
How to Learn from this Module
Here’s a simple guide for you in going about the module:
1. Read and follow the instructions very carefully
2. Take the pre-test. It is a simple multiple-choice test provided at the start
to determine how much you know about the content of this module.
3. Check your answers against the correct answers provided at the last
page of the module.
4. Be very honest in taking the test so you will know how much knowledge
you already have about the topic.
5. Read the different lessons included in this module.
6. Perform all the activities, as these will help you have a better
understanding of the topic.
7. Take the self-test at the end of each lesson.
8. Finally, take the post-test at the end of the module

iv
What I Know (Pretest)
Directions: Choose the letter of the best answer. Write the letter in your
Science Notebook.
1. Which of the following can make an electromagnetic stronger?
A. Increase the number coils of the wire
B. Add more dry cell
C. Use a bigger core
D. All of the above
2. Which device makes use of electromagnet?
A. telephone B. electric buzzer
C. electric bell D. all of the above
3. Which is a part of an electromagnet?
A. wire B. pin C. thumbtacks D. needles
4. Which of the following is a conductor in an electromagnet?
A. Copper B. rubber C. plastic D. wood
5. Which is NOT part of an electromagnet?
A. magnet B. wire C. nail D. battery
6. Which activity uses an electromagnet?
A. polishing the floor B. using a door bell
C. lighting a room D. cooking
7. In constructing an electromagnet, which material do you need?
A. dry cell B. wire
C. iron nail D. all of the above
8. What happens when one end of the wire is disconnected from the dry cell?
A. Electricity continues to flow.
B. Magnetism is gone.
C. The electromagnet becomes permanent.
D. It becomes stronger.
9. Which of the following will be attracted to an electromagnet?
A. pins B. needles C. thumbtacks D. all the above
10.Which is an example of a temporary magnet?
A. bar magnet B. horseshoe magnet
C. electromagnet D. magnetite
Key to answers on page 14

1
Lesson
1
What I Need to Know
 Construct an electromagnet
 Infer that electricity can produce magnetism
 Identify the parts of an electromagnet
What’s In
If you ever spill pins on a rug, you will find that a magnet is good to have. A
magnet can pick up objects with iron in them, such as steel pins.
But normally you don’t have magnets at home. So, you can instead make use
of an electromagnet. It is just a temporary magnet.
What’s New
Activity 1: Constructing an Electromagnet
What you need:
 1 pc. 1.5 v battery
 1 m long electric wire
 #4 common nail
 pins and other metallic objects
What to do:
1. Wind (coil) the electric wire 12-15 times around the nail. Remove one
centimeter of insulation from both ends of the wire.
2. Attach one end of the wire to the positive terminal of the battery and the other
end to the negative terminal to complete the circuit.
3. Bring the nail near the pins and other metallic objects. Observe how the
materials behave.
4. Predict what would happen if the wire was detached from the dry cells.
Constructing an
Electromagnet

2
What Is It
Answer the following questions.
1. What are needed in making an electromagnet?
2. What happened when you put the nail over the pins and other metallic
materials? Why?
3. When one end of the wire was disconnected from the battery, what happened?
Why?
4. What is an electromagnet?
5. What are the parts of an electromagnet?
Did you get the correct answers? Find out.
A simple electromagnet can be made using a dry cell, copper wire coiled around
a metal rod such as a nail.
The electricity that passes through the coiled wire around the nail produces a
magnetic field that causes the nail to act like a magnet. But unlike an ordinary magnet,
an electromagnet can be turned off and on.
An electromagnet operates only when there is a flow of electricity in the coil of
wire. When electricity stops flowing through the coil of wire, the nail stops attracting
any metal on magnetic material.
What’s More
Activity 2: Illustrating an Electromagnet
What you need:
 Pencil and bond paper
What to do:
1. Make your own illustration of an electromagnet. Label its parts.
2. What are the main parts of an electromagnet?
3. What is the function of each part?
dry cell
nail
wire
iron filings
Source: Into the Future: Science and Health Jose F. Llarinas et.al p.160

3
What I Have Learned
Self-Test 1
A. Directions: Choose the correct answer. Write the answer in your Science
Notebook.
1. Which acts like a magnet?
A. nail B. wire
C. dry cell D. none of the above
2. What is produced when electricity flows in a conductor?
A. coil B. magnetism C. nail D. wire
3. When does an electromagnet operate?
A. When there is a nail.
B. When there is a wire.
C. When there is a dry cell.
D. When there is a flow of electricity.
4. Which one is NOT part of an electromagnet?
A. the coil of wire
B. the nail as the core
C. the dry cell as source of electricity
D. pins, clips, and needles attracted by an electromagnet
5. What happens when a part of an electromagnet is disconnected?
A. It loses its magnetism.
B. Electricity continues to flow through it.
C. The electromagnet becomes a permanent magnet.
D. There is an increase in the number of materials attracted.
What I Can Do
Compose a short song about what an electromagnet is.
If you scored 4-5, CONGRATULATIONS! You may now proceed to the next lesson
after answering the next activity. If not, you need to go back and read the lesson again.

4
What I Need to Know
Design an experiment to determine the factors that affect the strength
of an electromagnet
What’s In
What is an electromagnet?
What are the parts of an electromagnet?
What makes an electromagnet work?
What happens to the electromagnet if the electricity doesn’t flow?
What’s New
Activity 3: Video-based Presentation
What you need:
 https://www.youtube.com/watch?v=XKUs7Dc9pKI
(How to Make an Electromagnet / Super Strong)
What to do:
1. Watch the video.
2. Write down important details.
What Is It
1. What does the video imply?
2. How is the electromagnet made stronger?
3. How was the strength of the electromagnet tested?
Did you get the right answer? Let’s find out by watching the video again.
Lesson
2
Designing an Experiment
to Determine the Strength
of An Electromagnet

5
What’s More
Activity 4: Making an Electromagnet / Super Strong
What you need:
 constructed electromagnet
used in previous day’s lesson
 sandpaper
 3 m copper wire
 3 pcs. 1.5 v battery
 tape
 #5 common nails
What to do:
1. Connect the 3 batteries using a tape.
2. With the supervision of any adult at home, detach the insulator of the wire. Use
the sandpaper to fully remove the insulation in both ends of the wire.
3. Coil the wire around the nail many times until enough is left to connect to the
battery.
4. Place the iron nail coil near pieces of scissors, pliers, and hammer.
5. Observe what happens.
Guide Questions:
1. Compare the two electromagnets you have. What difference can you cite?
2. How do the materials affect the electromagnet?
3. How can we make an electromagnet stronger?
Day 1
Electromagnet
Day 2
Electromagnet
1. 1 battery 3 batteries
2. 1 m long wire 3 m long wire
3. #4 common nail #5 common nail
Did you get the correct answers? Find out.
The strength of an electromagnet depends on (1) the number of turns in the
coil, (2) the size of the core and (3) the number of batteries. The greater the
number of turns the coil has, the stronger the electromagnet is. The bigger the size of
the core/nail, the stronger the electromagnet is. The more batteries, the stronger the
electromagnet is.
 visit https://www.someschoolgames.com/kids-games/electromagnet
- for a challenging game on electromagnets
 visit https://www.harcourtschool.com/activity/electromagnets
- for an interactive game on electromagnet
Learn and see for yourself how changing the number of battery and the number
of coils around a nail can affect the strength of the electromagnet.

6
What I Have Learned
Self-Test 2
A. Directions: Choose the best answer and write the letter in your Science
Notebook.
1. Which can increase the strength of an electromagnet?
A. increasing the number of batteries and coils around the nail
B. increasing the number of batteries or coils around the nail
C. decreasing the number of batteries and coils around the nail
D. decreasing the number of batteries or coin around the nail
2. Which of the following materials increases the strength of an electromagnet?
A. 2 m wire B. 5 m wire C. 1 m wire D. 3 m wire
3. Which of the following is considered in designing your own experiment to
determine the factors that affect the strength of an electromagnet?
A. Type of wire
B. Number of coils
C. Number of batteries
D. All of the above
4. Electromagnet can be made ___.
A. brighter B. better C. stronger D. bolder
5. Which statement is true?
A. All electromagnets are permanent magnets.
B. Increasing the number of coils in an electromagnet decreases its
strength.
C. Increasing the batteries increases its strength.
D. Both A and B.
What I Can Do
Design your own experiment to determine the factors that affect the strength of
an electromagnet. Write this on a piece of short coupon bond.
If you scored 4-5, CONGRATULATIONS! You may now proceed to the next lesson
after answering the next activity. If not, you need to go back and read the lesson again.

7
Lesson
3
What I Need to Know
Determine the factors that affect the strength of electromagnet
What’s In
Yesterday, you have designed an
electromagnet stronger than what you
had on the first day. What factors made
the electromagnet stronger?
Now, study the picture. Look how
the wire is coiled. How is the picture
different from the electromagnet that you
had constructed in our previous activity?
What’s New
Activity 5
What you need:
 3 dry cells (1.5 v)
 1 large iron nail
 6’ 10 mm iron rod
 50 cm copper wire
 50 staple wire
 paper clips
What to do:
1. Get the iron nail and touch it to the paper clips and staple wire. Observe what
happens.
2. Get the wire and wrap it tightly around the nail once. Touch the staples with it.
Are the staples attracted to it?
3. Experiment with different number of coils around the nails (10, 20, 30). Observe
what happens. See how many staples are attracted each time.
4. Do the same process (numbers 2 and 3) using two batteries and the rod.
Determining the Factors
that Affect the Strength
of an Electromagnet
Photo Credit: Umali, Precy R.

8
5. Record your observation in the table below.
Type of
Core
Number
of Coils
Number of
Batteries
Number of
Staples
picked/attracted
Number of
Clips
picked/attracted
1 large iron
nail
10 2
20 2
30 2
6’ 10 mm
iron rod
10 3
20 3
30 3
6. Disconnect the wire from the batteries. Observe what happens?
What Is It
Answer the following questions.
1. Does the electromagnet get stronger as you increase the number of coils
around the iron nail/rod? Prove your answer.
2. Increasing the number of batteries increases the electricity. Does the
electromagnet get stronger when the electricity increased? Prove your answer.
3. Does the type of core affect the electromagnet? How do you know?
4. What can make an electromagnet stronger?
Did you get the right answers? Find out.
The strength of an electromagnet depends on the electricity that passes
through it, the size of the metal rod, and the number of coils in the wire. A bigger metal
rod and a greater number of coils increase the magnetic field that is being produced.
Once magnetic field is produced, the metal rod has the capacity to attract other metallic
materials.
What’s More
Directions: Complete the items below.
Factors Affecting the Strength of an Electromagnet
1. The ____________ the number of batteries, the stronger the electromagnet is.
2. The _____________ the number of coils, the stronger the electromagnet is.
3. The _____________ the size of the core, the stronger the electromagnet is.

9
What I Have Learned
Self-Test 3
A. Directions: Read the situation below. Choose the letter of the correct answer.
1. Which is an example of a temporary magnet?
A. bar magnet
B. horseshoe magnet
C. electromagnet
D. magnetite
A. increase the number of batteries
B. increase the number of coils
C. change core into a bigger one
D. all of the above
3. Which does NOT tell about an electromagnet?
A. The less number of battery, the stronger it is.
B. The bigger the core, the stronger it is.
C. The more batteries, the stronger it is.
D. The more coils of wire in the core, the stronger it is.
4. Which is true about an electromagnet?
A. It is permanent.
B. It is temporary.
C. It always has electricity.
D. It cannot be made stronger.
5. You want to increase the strength of your electromagnet. What should you do?
A. Decrease the amount of electricity.
B. Remove the iron core.
C. Stop the flow of electricity.
D. Increase the turns of the wire.
What I Can Do
Compose a simple jingle about the factors that affect the strength of an
electromagnet.

10
Lesson
4
What I Need to Know
Explain the importance of electromagnet in daily life
What’s In
What makes the electromagnet stronger?
What happens when you increase the number of batteries on an
electromagnet?
How does the number of coil of wire affect the strength of an electromagnet?
What’s New
Activity 6: Know My Usefulness (Link #1)
What you need:
 https://www.youtube.com/watch?v=P1H4b25BCo4
Title: How Importance of Electromagnet in Daily Lives
 https://www.youtube.com/watch?v=4pz37NMAH3Y
Title: Magnets in Daily Life
Note: The teacher may choose which one to use.
What to do:
1. Watch the video clip.
2. Jot down the 4 situations that show how life is with or without the electromagnet.
3. Fill the table below.
Situation With Electromagnet Without Electromagnet
1
2
3
4
The Importance of
Electromagnet in Our
Daily Life

11
Activity 7: Magnets in Daily Life (Link #2)
What you need:
 Watch the video.
 List down the uses of electromagnet in daily life.
What Is It
1. How does the life of the student become easier using the modern technology?
2. What example of household appliances are used to make life easier?
3. Aside from the given examples, what are the importance of electromagnet in
our daily lives?
3.1 in health
3.2 in industry
3.3 in communication Key to answers on page 15
What’s More
Read the text. Answer the questions that follow.
Uses of Electromagnets
Electromagnet can be used in different ways. Most electrical devices at
home make use of electromagnets. Communication devices such as telephone,
mobile phone, radio and television have electromagnets that transmit and
produce sound.
Other electrical devices like electric toys, loudspeakers, magnetic
recording devices such as tape recorders use electromagnets. Visual devices
such as monitors also use electromagnets.
In junkyards, an electromagnetic crane is used to pick up scrap metals
such as used cars. Spacecrafts also use electromagnets to generate power.
12
Vacuum Cleaner
https://www.amazon.in/Inalsa-Spruce-1200-
Watt-Vacuum-Cleaner/dp/B07C1C5BLV
Electric Toy
https://www.aliexpress.com/item/3
2362034709.html
Electric Drill
http://wiki.dtonline.org/index.php/P
ortable_Electric_Drills
Electric Fan
https://ph.priceprice.com/Asahi-PF-620-
26587/specs/
Photo Credit: Science Works! 5, Myla
Corazon S. Casinillo p. 211

12
Guide Questions:
List down the uses of electromagnets in the following situations:
A. Electrical devices at home
B. Communication devices
C. Visual devices
D. Industry
What I Have Learned
Self-Test 4
A. Direction: Write T if the statement is true and F if the statement is false.
1. A telephone has an electromagnet.
2. Electromagnets are also used in industries.
3. Modern electrical devices use electromagnet.
4. Communication nowadays can be made easier even without
electromagnets.
5. Electromagnets can be used to generate electricity
What I Can Do
Research on the other importance of electromagnet in our daily lives. List down
specific examples.
Summary
1. An electromagnet is a temporary magnet which is made by making electricity
flow around an iron base. When electricity stops flowing, its magnetic behavior
stops, too.
2. The parts of an electromagnet are wire, battery and iron nail or core.
3. The strength of an electromagnet depends on the electricity that passes through
it, the size of the metal rod, and the number of coils in a wire.
4. Electromagnets are used in many different devices at home, in industry, in
communication and in health.

13
Assessment: (Post-Test)
Directions: Choose the best answer and write the letter in your Science
Notebook.
1. Which statement is true?
A. All electromagnets are permanent magnets.
B. Increasing the number of coils in an electromagnet decreases it strength.
C. Increasing the batteries increases its strength.
D. Both A and B.
A. increasing the number of coils around the nail
B. increasing the number of batteries
C. making the core bigger
D. all of the above
3. Which of the electromagnets would have the greatest magnetic field?
A. B. C. D.
4. Which of the following is NOT part of an electromagnet?
A. wire B. core C. battery D. needles
5. A magnet that works only when there is a flow of electricity.
A. Electromagnet B. Bar Magnet
C. Horse Shoe Magnet D. Magnetite
6. Which appliance does NOT use electromagnet?
A. telephone B. television C. radio D. broom
7. Which is NOT made of electromagnet?
A. cooking pan B. transformer C. generator D. motor
8. Which of these forces can be used in a motor?
A. magnetism B. wind C. friction D. gravity
9. Electromagnets are ___.
A. permanent B. instant C. temporary D. stable
10. Which makes an electromagnet work?
A. needle B. electricity C. pin D. thumbtacks
Photo Credit: Hebron, Rea Marie H., Science for Active Minds p. 270

14
Key to Answers
What I Know LESSON 1 What Is It
1. D
2. D
3. A
4. A
5. A
6. B
7. D
8. B
9. D
10. C
1. dry cell/ battery, electric wire, big nail
2. The pins and other metallic materials were attracted to the nail. The
nail has become a magnet due to electricity.
3. The pins and other metallic materials were no longer attracted to the
nail because the flow of electricity stopped.
4. An electromagnet is a piece of metal that acts like a magnet when
electric current flows through it.
5. The parts of an electromagnet are the battery, wire and iron nail.
What’s More What I Have Learned
1. Answers vary
2. The main parts of an electromagnets are the core (made
of metal rod such as nail) coil of wire and dry cell.
3. The core (nail) is the magnetic material.
The coil of wire is the conductor of electricity.
The dry cell is the source of electricity.
Self-Test 1
1. A
2. B
3. D
4. D
5. A
LESSON 2
What Is It
1. The video implies that an electromagnet can be made stronger.
2. The electromagnet is made stronger by using a long wire coiled many times around
the core/nail.
3. The strength of the electromagnet was tested by attracting heavier materials like
scissors, pliers, and hammer.
What’s More
1.
Day 1 Electromagnet Day 2 Electromagnet
1. 1 battery 3 batteries
2. 1 m long wire 3 m long wire
3. #4 common nail #5 common nail
2. The materials made the electromagnet stronger.
3. I can make the electromagnet stronger by using a long wire enough to be coiled many
times, increasing the power source and using a big core.
What I Have Learned Self-Test 2
1. A 2. B 3. D 4. C 5. C
LESSON 3
What Is It
1. Yes. The more coils, the greater the number of staple wire and clips are attracted.
2. Yes. The more batteries, the more staple wire and clips are attracted.
3. Yes. The bigger the core, the more staple wire and clips are attracted.
4. The strength of an electromagnet depends on the electricity that passes through it, the
size of the metal rod, and the number of coils in a wire

15
What’s More What I Have Learned Self-Test 3
1. Higher 1. C 4. B
2. More 2. D 5. D
3. Bigger 3. A
LESSON 4
What’s New
Activity 6
Situation With Electromagnet Without Electromagnet
1 mobile phone
2 broadband
3 remote control
4 fluorescent light
Activity 7
Uses of electromagnet in daily life:
1. used in credit and debit cards
2. used in door opening system
3. used in audio tapes
4. magnetic letter board
5. in speakers
6. magnetic separation
7. bar code system
8. Magnetic Resonance Imaging (MRI)
What Is It
1. The student can easily communicate to anybody through the use of mobile phone or
internet.
2. The remote control of the TV
3. In health – MRI or Magnetic Resonance Imaging
In industry – magnetic separation of materials
In communication – used in audio tapes, in speakers
What’s More
A. Electrical
devices at home
(answer vary)
1. Electric bells
2. TV
3. Washing
machine
B. Communication
devices
1. Telephone
2. Mobile phone
3. Radio
C. Visual devices
1. Monitor
D. Industry
1. Electromagnetic
crane
2. Spacecrafts use
electromagnets to
generate power
What I Have Learned Assessment (Post Test)
Self test 4
1. T
2. T
3. T
4. F
5. T
1. C 6. D
2. D 7. A
3. D 8. A
4. D 9. C
5. A 10. B

16
References:
CoroneL, Carmelita C, et.al, (2010) Exploring and Protecting Our Word, Vibal
Publishing House, Inc., Manila, Philippines pp. 215-216
Casimillo, Myla Corazon S. (2012) Science Works! 5, Diwa Learning Systems Inc.,
Philippines pp. 210-213
Hebron, Rea Marie M., (2015) Science for Active Minds 5, Diwa Learning Systmens,
Philippines pp. 267-268
Llarimas, Jose F. et.al, (1999) Into The Future: Science amd Health, Diwa Scholastic
Press Inc, Philippines, pp. 160-161
Science Writing Team, Science Exemplar, Batangas Province Philippines pp. 599-617
Sarte, Evelyn T., (2016) Science Beyond Boarders, Vibal Group, Inc. Quezon City
Philippines.
Links:
https://www.youtube.com/watch?v=XKUs7Dc9pKl
https://www.youtube.com/watch?v=P1H4b25BC04
https://www.youtube.com/watch?v=4pz37NMAH3Y
http://www.someshoolgames.com/kids-games/electromagnet/
For a Challenging Game on Electromagnets
http://www.harcourtschool.com/activity/electromagnets/
For an Interactive Game on Electromagnets

17
For inquiries and feedback, please write or call:
Department of Education – Bureau of Learning Resources (DepEd-BLR)
DepEd Division of Cagayan de Oro City
Fr. William F. Masterson Ave Upper Balulang Cagayan de Oro
Telefax: ((08822)855-0048
E-mail Address: cagayandeoro.city@deped.gov.ph

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