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In this topic, you will learn how matter is classified based on its physical and chemical properties. Understanding these properties helps explain how substances interact and change. Discussion Question: What is the difference between physical and chemical properties?

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Source:

The Central Science by Brown et al., ChemLibreTexts

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All matter has physical and chemical properties. Physical properties are characteristics that scientists can measure without changing the composition of the sample under study, such as mass, color, …

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A world in motion! Explore the forces that drive movement, the laws that govern motion, and how energy makes everything happen. Discussion Question:  Why do seatbelts and airbags help keep passengers safe in a car crash?

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https://www.depednegor.net/uploads/8/3/5/2/8352879/learning_module_science.pdf

Source:

DepEd Negros Oriental – Science Learning Module

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DALL·E 2025-03-26 19.10.45 - A visually engaging science-themed background illustration for the topic of Forces, Motion, and Energy. The image should include elements like Newton'

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Explore the wonders of Earth and space! Learn about the dynamic processes that shape our planet and the vast universe beyond. Discussion Questions: Why is Earth the only known planet that supports life?

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Source:

SlideShare – G10 Science Earth and Space Learner’s Module (1st Quarter)
Publisher:

Department of Education (DepEd)

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G10 Science :Earth and Space -Learner’s Module 1st Quarter

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G10 Science :Earth and Space -Learner’s Module 1st Quarter - Download as a PDF or view online for free

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A dynamic exploration of living things and their interactions with the environment. Learn how organisms adapt, survive, and thrive in different ecosystems! Discussion Questions: What would happen if one species disappeared from a food web? How would it affect the balance of the ecosystem?

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Source:

Living Things & The Environment– SlideShare

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An ecosystem is all the living and nonliving things that interact in an area. An organism's habitat is the place where it lives and gets what it needs to survive, like food, water, and shelter. Biotic factors are the living parts of an ecosystem like plants and animals. Abiotic factors are the nonliving parts like water and sunlight. A species is a group of organisms that can reproduce, a population is all the members of a species in an area, and a community is made up of all the populations living together. Ecology is the study of how living things interact with each other and their environment.

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Living Things & The Environment - Download as a PDF or view online for free

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A fascinating look into Weather and Climate Change—understand how atmospheric conditions shape our world, the factors that influence climate, and the effects of human activities on global weather patterns. Discussion Questions: Compare and contrast natural climate change with human-induced climate change.

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Source:

SlideShare – Weather and Climate Presentation

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WEATHER AND CLIMATE.pptx - Download as a PDF or view online for free

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A fascinating exploration of cells and genetics! Understand how genetic information is stored, expressed, and passed on through generations. Learn about DNA, RNA, and cellular processes that define life. Discussion Questions: How do environmental factors influence the expression of genetic traits?

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Source:

Genetics and Cellular Function, SlideShare, uploaded by getyourcheaton.

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Genetics and Cellular Function - Download as a PDF or view online for free

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 Exploring Electrical Energy and Power! A deeper look into how electrical energy is generated, transferred, and converted into useful work. Learn about power consumption, efficiency, and real-life applications of electrical energy. Discussion Question: If an electric fan operates at 200W for 3 hours, how much energy does it consume?  

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Source:

Electrical Energy and Power, BYJU'S

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Electrical energy is an important concept in science, yet it is frequently misunderstood. So what exactly is electrical energy and what are some of the rules applied when it is used in calculations? In this article, let us find answers to these questions.
Electrical Energy Units Electrical Energy Examples Electric Power Practice Questions
What is an Electrical Energy?

Electrical energy is the energy derived from electric potential energy or kinetic energy of the charged particles. In general, it is referred to as the energy that has been converted from electric potential energy. We can define electrical energy as the energy generated by the movement of electrons from one point to another. The movement of charged particles along/through a medium (say wire) constitute current or electricity.

Electrical Energy Formula

A cell has two terminals - a negative and a positive terminal. The negative terminal has the excess of electrons whereas the positive terminal has a deficiency of electrons. Let us take the positive terminal as A and the electrical potential at A is given by V(A). Similarly, the negative terminal is B and the electrical potential at B is given by V(B). Electric current flows from A to B, and thus V(A) > V (B).

The potential difference between A and B is given by

V = V(A) - V(B) > 0

Mathematically, electric current is defined as the rate of flow of charge through the cross-section of a conductor.

Thus, it is given by I = ∆Q/ ∆t where I is the electric current and ∆Q is the quantity of electric charge flowing through a point in time ∆t.

The potential energy of charge Q at A is Q V(A) and at B, it is Q V(B). So the change in the potential energy is given by

∆Upot = Final potential energy - Initial potential energy

= ∆Q [(V (B) - V (A)] = -∆Q V

= -I V∆t (Since I = ∆Q/ ∆t)

If we take the kinetic energy of the system into account, it would also change if the charges inside the conductor moved without collision. This is to keep the total energy of the system unchanged. Thus, by conservation of total energy, we have:

∆K = -∆Upot

Or ∆K = I V∆t > 0

Thus, in the electric field, if the charges move freely across the conductor, there would be an increase in the kinetic energy as they move.

When the charges collide, the energy gained by them is shared between the atoms. Consequently, the vibration of the atoms increases resulting in the heating up of the conductor. Thus, some amount of energy is dissipated in the form of heat in an actual conductor.

Units of Electrical Energy

The basic unit of electrical energy is the joule or watt-second. An electrical energy is said to be one joule when one ampere of current flows through the circuit for a second when the potential difference of one volt is applied across it. The commercial unit of electrical energy is the kilowatt-hour (kWh) which is also knwon as the Board of trade unit (B.O.T).
1 kwh = 1000 × 60 × 60 watt - second
1 kwh = 36 × 10 ⁵ Ws or Joules
Generally, one kwh is called one unit.

What are some examples of electrical energy?

A few examples of electrical energy are:

In a car battery, a chemical reaction results in the formation of an electron which possesses the energy to move in an electric current. These moving charges provide electrical energy to the circuits in the car.

Lightning, during a thunderstorm, is an example of electrical energy - what we see as lightning is nothing but electricity discharging in the atmosphere.

Electric eels generate electrical energy and use it against predators for defence.

Electrical Energy Into Mechanical Energy

Electrical energy can be converted into other forms of energy like heat energy, light energy, motion etc. The best-known example are:

Fan: The motor in Fan converts electrical energy into mechanical energy

Bulb: Here the electrical energy is converted into light energy.

Some of the keynotes on electrical energy is tabulated below

What is Electric Power?
∆W = I V∆t
Electric power Definition - It is the rate at which work is done or energy is transformed in an electrical circuit. Simply put, it is a measure of how much energy is used in a span of time.

In physics, the rate of transfer of electrical energy by an electrical circuit per unit time is called electrical power. Here electrical energy can be either kinetic energy or potential energy. In most of the cases, potential energy is considered, which is the energy stored due to the relative positions of charged particles or electric fields. Electrical power is denoted by P and measured using Watt.
P = I²R
We talked about the energy that is dissipated due to the heating up of the conductor. The energy dissipated in time interval ∆t is given by
P = V²/R
And the energy dissipated per unit time is actually the power dissipated, which is given by P = ∆W/∆t. But we know the formula for power is given by P = I V

Hence, according to Ohm's law, V = IR. Substituting we have,
Q1: Define electrical energy.
Or
Q2: Write the units fo electrical energy.
It is this power which is responsible for heating up the coil of a bulb, which gives out heat and light.
Q3: Write the uses of electrical energy.
Practice Questions On Electric Energy And Power
Q4: What is the speed of electricity?
Ans: Electrical energy can be due to either kinetic energy or potential energy. Mostly it is due to potential energy, which is energy stored due to the relative positions of charged particles or electric fields.
Q5: What constitutes electricity?
Ans: The units of electrical energy are joules, kilowatt hour, electron-volt
Q6: Define electric Power
Ans: The uses of electrical energy are plenty. Some of them are Lighting, cooling, heating. Operating appliances, electronics, computers, machinery. Public transportation systems
Q7: Write the SI unit of electric power
Ans: Electricity travels at the speed of light that is more than 186,000 miles per second.
Q8: Write the electric power formula and explain the terms
Ans: The movement of mobile electrons constitute electricity.

Ans: electric power measure of the rate of electrical energy transfer by an electric circuit per unit time.
Q9: Is electric power a scalar quantity or vector quantity?
Ans: The SI unit of electric power is watt
Q10: How can we express power using Ohms law?
Ans: The electric power is given by P = VI.

Where V is the potential difference, I is the electric current and P is the electric power.

Ans: Electric power is the scalar quantity
Related Physics Concepts:
Ans: Power formula can be rewritten using Ohms law as P =I2R or P = V2/R.

Where V is the potential difference, I is the electric current, R is the resistance and P is the electric power

Hope you have understood about Electric energy and power, How it is defined, its Symbol, Units, Formula, Terms. For a better understanding of current electricity do read the related articles and answer the practice questions.

Stay tuned with BYJU'S for more such interesting articles. Also, register to "BYJU'S-The Learning App" for loads of interactive, engaging physics related videos and an unlimited academic assist.

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Electric Energy and Power - Definition, Formula, Unit and Examples

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Electrical energy is an important concept in science, yet it is frequently misunderstood. So what exactly is electrical energy and what are some of the rules applied when it is used in calculations? In this article, let us find answers to these questions.

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A journey into the world of waves! 🌊🔊💡 Discover how sound and light travel, interact, and shape our daily experiences. Explore the nature of waves and their fascinating properties! Discussion Questions: What are the basic properties of waves?

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Source:

Light and Sound, SlideShare, published by luisagema (April 16, 2013).

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Light and sound - Download as a PDF or view online for free