S T U D E N T ’ S A C T I V I T Y S H E E T

Name: __________________________________________ Date: __________________

Grade & Section: _______________________________ Subject: Science 8

Content Standard: The learners demonstrate an understanding of current-voltage-resistance

relationship, electric power, electric energy, and home circuitry.
Performance Standard: The learners shall be able to discuss phenomena such as blue sky,
rainbow, and red sunset using the concept of wavelength and frequency of visible light.
Learning Competencies: Explain the advantages and disadvantages of series and parallel
connections in homes
Learning Content: Electricity: Series and Parallel Circuit
Learning Resources: Nariz, M.A., et. al (2021). Science for Innovative Minds 8: Makati City,
Philippines: DIWA LEARNING SYSTEMS INC. pp. 105-122, Genyo e-Learning, YouTube
Core Values: Takes care of mother earth as we use different energy forms.

Lesson No. 11 Time Frame: 1 hour

Learning Targets: At the end of the lesson, I CAN:
a. describe the relationship among voltage, current, and resistance;
b. solve problems involving Ohm’s Law;
c. differentiate parallel and series circuits; and
d. appreciate the importance of electricity by creating a model of any
structure that uses parallel/series circuit.
INTRODUCTION
A. Motivation

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U N W O V Q H F G S I N X I C
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 Electricity may be generated through different means. Most developed countries have figured out how
to generate electricity with convenience and the least expense. Earth has provided humankind more than what
we actually need to continue living. This includes renewable sources of energy such as moving water, winds,
and heat from Earth’s interior. Theses renewable resources are a great help in providing handy and affordable
electricity. Because of electricity, life has become more convenient and more comfortable in terms of
transportation, communication, business, education, and other necessities in life. In our new topic, we will
appreciate more on how to consume electricity properly to, at least, help mother earth not to be abused, and the
next generation will still experience what we experience right now. So, what are we waiting for? Let us start.

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II - INTERACTION

A. Learning Activities
Lesson 1 Ohm's Law

The movement of electrons. Electrons create charge, which we can

harness to do work. Your light bulb, your stereo, your phone, etc.,
are all harnessing the movement of the electrons in order to do
work. They all operate using the same basic power source: the
movement of electrons.
Quantities Meaning Unit Symbol
Current (I) The current that flows in a conductor in ampere Ampere A
Volt (V) The potential difference in voltage Voltage V
Resistance (R) The resistance in Ohm Ohm Ω

Sample Problem:
What is the voltage of a circuit if the current passing through it is 1.50A and the
total resistance is 23Ω?
Given: Formula: V = (I)(R)
I = 1.50A Solution:
R = 23Ω V = (1.50A) (23 Ω)
Unknown: Voltage V = 34.5V

Read more about Ohm’s Law on your Science for

Innovative Minds book pages 105-110.

Activity No. 1 – Problem Solving

Instructions: Solve the following problems. Show your complete solution by providing the given, the
unknown variable, the formula, and the final answer.
Problem No.1:

Problem No.2:

Problem No.3:
 A circuit is a path where charges can flow from a
voltage source.

Series Circuit
The current flowing through each resistor is the same, since there is only a
single path for the current to flow.

Parallel Circuit An electric circuit in which two or more components are connected across
two common points in the circuit so as to provide separate conducting paths for
the current.
Type of Circuit Advantages Disadvantages
Series Circuit  Don’t overheat easily  If one light bulb goes out, the others go
out as well.
 Don’t blow out very fast
Parallel Circuit  One light bulb goes out, but the other  It uses a lot of wires
light bulb does not go out.
 It is used in houses
Lesson 2 Circuit

Activity 2.1: Venn Diagram

Instructions: Using a Venn diagram, compare and contrast a series circuit and a parallel circuit.

Series Circuit Parallel Circuit

Laws of Resistance in Series Circuit Laws of Resistance in Parallel Circuit

1. The current passing through each resistance is 1. The total current in a parallel circuit is equal to
 the same. the sum of the currents in the separate branch.
I T = I 1 = I 2 = I 3 = … = In I T = I1 + I2 + I3 + …

2. The total voltage is the sum of the separate 2. The total voltage in a parallel circuit is the same
voltages added together. for each separate branch.
VT = V1 + V2 + V3 + … + Vn VT = V1 = V2 = V3 = …
3. The total resistance is equal to the sum of 3. The reciprocal of the total resistance in a parallel
separate resistances. circuit is equal to the sum of the separate resistance.
RT = R1 + R2 + R3 + … + Rn 1= 1 + 1 + 1+…
RT R1 R2 R3
Sample Problems:
 Read more about Ohm’s Law on your Science
for Innovative Minds book pages 113-120.
Activity 2.2: Solve it!

Solve the following problems. Show your complete solution by providing

the given, unknown, formula, and the final answer.

1. Determine the total resistance in the series connection here.

Lesson 3 Circuit Symbols and Safety Devices

2. Determine the total resistance in the parallel circuit here.

Conventional symbols are

useful for illustration or
drawing a schematic diagram
and to show a circuit is
connected together. The
 Activity 3.1: Schematic Diagram
Instructions: Using the different circuit symbols, draw schematic diagrams of an electric
circuit based on the given components, and label the parts.
Series Circuit

Parallel Circuit

Safety Devices – Connected to electrical circuits

Circuit Breaker
An automatic switch that turns off the circuit when there is
overloading of current (which can cause fire). Imagine that you are
running very fast and someone suddenly stops you, that person is like the
circuit breaker.

Referred to as a sacrificial device. It melts when there is overloading

of current. This prevents damage to the circuit.

LET US FUSE THEM TOGETHER!

Electric Current
Electric Circuit
Safety Devices