SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

COURSE OVERVIEW

This course pack is designed for educational administrators, school heads and teachers.
It aims to provide learners with inputs on the latest trends particularly on the concept of
electricity.

Understanding the basic principles of electricity is an essentials skill for all branches of
engineering and information technology. Explain the flow and origin of electricity. Students will
determine the different components of electronics and the applications of it. Give emphasis on
the career opportunities of a person who study electronics.

In order for learners to gain competency in this course, this course pack has been
structured into three modules as follows:

Module 1: Introduction to Electricity

Module 2: Electricity Quantities, Law and Calculation

At the completion of this module, you should be able to:

Discuss the importance of electricity.

Differentiate and discuss the negatively and positively charges.
Explain The Nature And Basic Laws Of Charge
Describe The Characteristics Of Conductors And Insulators
Contrast a Variable Resistors By Interpreting The Resistor Color Code
Describe The Characteristics Of Voltage And Current Sources

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

MODULE

INTRODUCTION TO ELECTRICITY

In this Module

What is Electricity?
What is electronics?
Where can electronic be applied?
What are the Career opportunities of a person who study electronics?
Atomic composition.

This tutorial will introduce the concept of what electricity. These are the basic building
blocks to understanding electricity and the information you will need. The contribution of
electricity the deals greatly affects worldwide technological development of the humanity.

At the completion of this module, you should be able to:

Define electricity;
Demonstrate skills in discussing the impact of electronic;
Understand the career opportunities for those who study the electronics.

Are you prepared? Then start the lessons now!

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

LESSON

Electronics in Todays World and Atomic Structure

OBJECTIVES:

Students can discuss the importance of electricity.

Students can determine and distinguish the importance of electronics in the world of
technology
Student can understand the application of electronics.

INTRODUCTION:

The used of electricity plays a great role in humans life struggle for survival. It is
essential for each student to determine the importance of electricity.

ACTIVITY:

Video presentation on the history and impact of electricity.

Visual art presentation on atomic structure.

ANALYSIS:

Why do we need to study electricity?

What are the significances of knowing the application of electronics?

ABSTRACTION:

Electricity is the flow of electrical power or charge. It is a secondary energy source which
means that we get it from the conversion of other sources of energy, like coal, natural gas, oil,
nuclear power and other natural sources, which are called primary sources. The energy sources
we use to make electricity can be renewable or non-renewable, but electricity itself is neither
renewable nor non-renewable. Electricity is a basic part of nature and it is one of our most
widely used forms of energy.

Electronics is chiefly concerned with the generation, distribution, and utilization of

electric power control and electronic communications. It typically operates with low voltages
and currents.

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

Technology is the study and science of techniques. It is involved in developing

and implementing special methods and procedures to provide the goods and services
society needs and wants. The technician is a person trained in these
techniques and uses them to perform his/her duties.

Where we apply electronics?

1. Computers-all forms of modern computers are electronic devices. Computers are used
to control such diverse systems as airplane navigation and flight, business record
keeping, automotive emissions monitoring, elevator operation and scheduling, satellite
communication, and environmental control.
2. Communications- takes a wide range of forms, including telephone systems, fiber optic
links, microwave transmissions, private and commercial radio networks, cellular phone
systems, televisions, satellite links, and underwater communications for submarines.
3. Agriculture-electronics is used for many agricultural applications, including livestock
monitoring, and feeding, automatic equipment controls, livestock environmental
control, tractor engine control, and dairy production control and monitoring.
4. Consumer electronics- includes such common items as televisions, video cassette
recorders(vcrs), radios, stereo systems, laser disk players, vcds, dvds, mp3 players,
mp4 players, svcds, home security systems, and many electronic convenient items.
5. Automotive electronics-this area includes automotive sound systems, emission control,
engine control, radar sensors, two way radios, mobile telephone, garage door openers,
and complete onboard monitoring devices.
6. Marine electronics- includes sonar equipment, navigational systems, communication
equipment, emergency beacons, marine telephones, and many engine control and
monitoring devices.
7. Aerospace applications-there are incredible numbers of electronic systems aboard,
commercial and military aircraft. These include system for navigations, weapon control,
communications, autopilot, automatic electronic identification, environmental control,
and electronic countermeasures for interfering enemy electronics. Of course, aerospace
applications extend to include various forms of spacecraft and satellites, which have
extensive array of electronic systems.
8. Industrial electronics-is a broad classification that includes such things as automated
factory equipment, computerized monitoring and control for chemical processes,
automated warehouses and many forms of processes control systems for monitoring
and controlling manufacturing processes.
9. Robotics-robots are essentially a subset of industrial electronics. They are computer
controlled machines that can perform repetitive tasks with exceptional precision.
10. Sports-there are numerous electronics applications in sports such as timers,
scoreboards, electronic training equipment, speed measuring equipment,
communication systems, and video equipment.
11. Medical electronics-many medical procedures rely on sophisticated electronic devices. A
few of these include x-ray machines, laser surgery, ultrasound imaging, magnetic

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

resonance imaging(mri), heart pacing equipment, artificial kidneys, electrocardiograms,

and many other diagnostic tools.
12. CAD/CAM-computer aided design and computer-aided manufacturing describe an
integrated manufacturing environment where all phases of a products development are
done with the aid of a computer.

What are the Career opportunities of a person who study electronics?

Because there is such an endless list of electronics application, there is a similar list
possible career opportunities in the field of electronics. The following career positions were
selected to show the range of opportunities. The job titles are generic. Many companies refer
to similar positions by different job titles.
1. Bench technicians-troubleshoots and repairs defective electronic equipment that has
been brought to shop.
2. Field service technicians-goes to the customers site to perform equipment calibration,
troubleshooting and repair. Some equipment that is serviced in this manner includes
computer, radar installations, security systems, environmental control systems and
point-of-sale terminals.
3. Industrial technician/electrician-this technician performs the tasks of both bench and
field service technicians, but is generally limited to a single site.
4. Engineering technician-also called research and development technician. Generally
works in a laboratory environment, and plays a key role in the development cycle for
new products.
5. Applications engineer-many technicians become applications engineers once they have
become experts on their employers products. An application engineer meets with
customers, analyzes their applications, and shows the customer how to effectively
utilize the products sold by their company.
6. Technical writer-most companies produce documentation to accompany their products.
Some of the documentation is proprietary and is used only within the company. Other
documentation, such as the operators manual, is delivered to the customer. A technical
writer develops this documentation.

What are the basic common Electronic components?

1. Resistors-used to limit the amount of current flow in an electrical circuit.

2. Cells and batteries-cells and batteries are used as sources of voltage.
3. Inductors-this is fundamental electronic component-also called a coil that consists of a
spiraled or coiled wire. The inductor is used to store electrical energy in the form of
electromagnetic field.
4. Capacitors-is another basic electrical component that is used to store electrical energy
in the form of electrostatic field.
5. Transistors and diodes-these are called solid state components of semiconductors. They
are used in circuits, including amplifiers.

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6. Integrated circuits-these are incredibly complex device that are actually miniature
versions of complete circuits. Some integrated circuits have over a million equivalent
components(resistors, transistors, and so on)
7. Transformers-are used to transform (increase/decrease) alternating current.
8. Switches-are used to open or close an electrical circuit.
9. Fuses and circuit breakers-these devices used to protect a circuit from excessive
current flow.
10. Motors-is an electromechanical device that converts electrical energy into mechanical
energy.
11. Indicators-these devices are used to emit light.

THE SCIENCE OF ELECTRICITY developed by the National Energy Education Development

Project

In order to understand how electric charge moves from one atom to another, we need
to know something about atoms. Everything in the universe is made of atomsevery star,
every tree, every animal. The human body is made of atoms. Air and water are, too. Atoms are
the building blocks of the universe. Atoms are so small that millions of them would fit on the
head of a pin.

Atoms are made of even smaller particles. The center of an atom is called the nucleus. It
is made of particles called protons and neutrons. The protons and neutrons are very small, but
electrons are much, much smaller. Electrons spin around the nucleus in shells a great distance
from the nucleus. If the nucleus were the size of a tennis ball,
the atom would be the size of the Empire State Building. Atoms
are mostly empty space.

If you could see an atom, it would look a little like a tiny

center of balls surrounded by giant invisible bubbles (or shells).
The electrons would be on the surface of the bubbles, constantly
spinning and moving to stay as far away from each other as
possible. Electrons are held in their shells by an electrical force.

The protons and electrons of an atom are attracted to each other. They both carry an
electrical charge. An electrical charge is a force within the
particle. Protons have a positive charge (+) and electrons have a
negative charge (-). The positive charge of the protons is equal to
the negative charge of the electrons. Opposite charges attract
each other. When an atom is in balance, it has an equal number
of protons and electrons. The neutrons carry no charge and their
number can vary.

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

The number of protons in an atom determines the kind of atom, or element, it is. An
element is a substance in which all of the atoms are identical. Every atom of hydrogen, for
example, has one proton and one electron, with no neutrons. Every atom of carbon has six
protons, six electrons, and six neutrons. The number of protons determines which element it is.

Electrons usually remain a constant distance from the nucleus in precise shells. The shell
closest to the nucleus can hold two electrons. The next shell can hold up to eight. The outer
shells cans hold even more. Some atoms with many protons can have as many as seven shells
with electrons in them.

The electrons in the shells closest to the nucleus have a strong force of attraction to the
protons. Sometimes, the electrons in the outermost shells do not. These electrons can be
pushed out of their orbits. Applying a force can make them move from one atom to another.
These moving electrons are electricity.

Current flow

-The continuous directed movement of electrons.

APPLICATION:

Base on the pictures below you have to identify if what career opportunities they really suited
and discuss it in front.

1. 2. 3.

4. 5. 6.

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

LESSON

Units of Measure and Technical, Scientific, and

Engineering Notation

OBJECTIVES:

Students can solve given technical, scientific, and engineering notation problems.
Students can relate the importance of technical, scientific, and engineering notation in
their daily lives.
Students can perform and expressed series of digits multiplied times a power of ten
numbers into small numbers using different power-notations.

INTRODUCTION:

By using exponents, numbers can be formatted. For very large or very small numbers, it
is sometimes simpler to use "notation" (because scientists often deal with very large and very
small numbers). Focus on the format for writing a number in different power-of-ten expression.

ACTIVITY:

Teachers demonstration the different process of expressing power-of-ten and then

board work and seatwork follows.

ANALYSIS:

Why do we need to study different expressing power-of-ten expression?

ABSTRACTION:

1. Technical notation

Electronic requires the use of extremely small and extremely large numbers- often
within the same problem.

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Powers-of-ten- refers to the value that results when the number ten is raised to a
power. Any number can be expressed as a series of digits multiplied times a power of
ten.

Following procedures will allow you to express any number using power of ten.

1. Move the decimal point to any desired position while counting the number of positional
changes.
2. If the decimal point was moved to the left, the exponent will be positive, if the decimal
point was moved to the right, the exponent will be negative.
3. The magnitude of the resulting number of the exponent will be the same as the number
of positional changes made by the decimal point.

Example:

Convert the following numbers to equivalent numbers expressed in power of ten form.

1. 25.5
2. 126.6
3. 5423.3
4. 12477.5
5. 2344234.8
6. 23324234.6
7. 123423.65
8. 3242342.45645
9. 234234.34534
10. 24543534.5345345

Sometimes the original number is expressed as a power of ten, and it is desirable to express
is as a different power of ten. The process here is identical to that just described except that
your count starts with the current power of ten. The procedure follows:

1. Subtract the current exponent of ten from the new exponent of ten.
2. If the result of step 1 is positive, then move the decimal point to the left.
3. If the result of step 1 is negative, then move the decimal point to the right.
4. In either case (step2 or 3), move the decimal point to the number of positions indicated
by the magnitude of the result in step 1.

Example:

Make the indicated conversions

1. 233 x 10 converts to ________ x 10

2. -0.03 x 10 convert to _________ x 10

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3. 327222 x 10 converts to _______ x 10

4. 2144 x 10 converts to _________ x 10
5. 564 x 10 converts to __________ x 10

2. Scientific notation requires the final form to be expressed as a number between one
and ten times a power of ten. The procedure is as follows:

1. Move the decimal point until it is between the two leftmost nonzero digits.
2. Increase or decrease the exponent by one for each positional change the decimal point
was moved left or right, respectively.

Example:

1. 324.6
2. 0.0032
3. -43.56 x 10
4. 234.54 x 10
5. 72315.45 x 10

3. Engineering notation another form more commonly used in electronics for expressing
large or small numbers. In the case of scientific notation, we have a fixed decimal point
position (between the two leftmost nonzero digits) and a variable exponent. For
engineering notation, we can move the decimal point to any convenient position as long
as the resulting exponent is either zero or a multiple of 3 (e.g. -6, -3, 0, 3, 6, 9). The
procedure can be stated as follows.

1. Write the number using the powers of ten.

2. Move the decimal point left while increasing the exponent or right while decreasing the
exponent.
3. The final exponent must be zero or a number that is evenly divisible by three.

Example:

1. 129 x 10
2. 0.0046 x 10
3. -24.6 x 10
4. 734.234 x 10
5. 23555345.23 x 10

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Rules for calculation

Addition and subtraction operation require the exponents of the two numbers or operands
to be identical before adding or subtracting the base numbers. The result also has the same
common exponent.

1. Express the two numbers in any convenient power-of-ten form that results in identical
exponents.
2. Add or subtract the base numbers.
3. Assign an exponent that is the same as the exponent of the two numbers.
4. Readjust the decimal point and exponent to any preferred form.

Example:

1. 32.9 x 10 +56 x 10
2. 654 x 10 - 2500 x 10
3. -432 x 10 + 0.0002 x 10
4. 34 x 10 + 7 x 10

Multiplication and division of numbers expressed in a power-of-ten form are more direct
than are addition and subtraction. The procedure follows:

1. Multiply or divide the two base numbers as usual.

2. When multiplying, the power of ten in the result is the sum of the powers of ten for the
two original numbers
3. When dividing, the power of ten in the result is obtained by subtracting the exponent of
the divisor from the exponent of the dividend.

Example:

1. 75 x 10 / 25 x 10
2. 400 x 10 / 5 x 10
3. 0.006 x 10 / 1200 x 10
4. 125 x 10 x 0.2 x 10
5. 0.22 x 10 x 119.6 x 10

APPLICATIONS:

Perform the indicated calculations.

Addition and subtraction.

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1. 233.3 x 10 + 8.9 x 10
2. 0.0034 x 10 - 12.6 x 10
3. 32 x 10 + 0.000075 x 10
4. 0.6 x 10 - 14.0
5. 0.4 x 10 + 10 x 10

Multiplication and Division

1. 100 x 10 / 25 x 10
2. 0.5 x 10 x 40 x 10
3. 2.50 x 10 / 1, 250 x 10
4. 1, 405 x 26 x 10
5. 1 x 10 x 1 x 10

Fill in the blanks to make the following equations correct:

a. 22.3 = ______ x 10
b. 2345 = ______ x 10
c. 0.0023 = _____ x 10
d. 0.062 = ______x 10
e. 5.9 x 10 = 5900 x 10
f. 0.0023 x 10 = ____10

Convert the following numbers to scientific notation form

a. 234
b. 0.234
c. 534, 000, 000, 000
d. 0.000045
e. 434 x 10
f. 0.0000345 x 10
g. 43.5 x 10
h. 0.05 x 10

Convert the following to engineering notation form

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a. 543 x 10
b. 34, 400, 000, 000 x 10
c. 0.0035 x 10
d. 0.00000000054 x 10
e. 52 x 10
f. 253.6 x 10
g. 126666.2 x 10

Perform the following calculations without the use of calculator. Show your work.

a. 34.6 x 10 + 17.9 x 10
b. 0.0003 x 10 - 280 x 10
c. 54.7 x 10 + 10 x 10
d. 342 x 10 - 62 x 10
e. 5 x 10 + 5 x 10
f. 0.0034 50 x 10

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

LESSON

Multiple and Submultiples Units

OBJECTIVES:

Students can apply different prefixes and symbols in solving the power-of-ten quantity.
Students perform solving requiring quantity express to the nearest standard prefix and
symbol.

INTRODUCTION:

Working with powers of ten and prefixes, often seem to complicate, rather than
simplify, the operation. However, if you practice, you will not only master the techniques, but
you will soon realize their labor-saving effects. A technician must be proficient with prefixes and
powers of ten, or she will be working in a world that speaks a foreign language.

ACTIVITY:

Teachers demonstration the different process of expressing power-of-ten and then

board work and seatwork follows.
Group discussion

ANALYSIS:

Why do we need to study different power-of-ten expression using prefixes and

symbol?

ABSTRACTION:

All of the powers of ten that are used with engineering notation have corresponding prefixes
and symbols
Power of ten Prefix Symbol Magnitude
10 femto f One-quadrillionth
10 pico p One-trillionth
10 nano n One-billionth
10 micro One-millionth
10 milli m One-thousandth

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10 centi c One-hundredth
10 Whole units need no prefix or symbol
10 kilo k Thousand
10 mega M Mllion
10 giga G Billion
10 tera T trillion

We can use prefix to express a quantity by applying the following procedure:

1. Write the quantity in engineering notation.

2. Replace the power of ten with the equivalent prefix.

Example.

Write the following quantities using the nearest standard prefix as listed in the table.

a. 500 x 10 volts
b. 210 x 10 henries
c. 1.05 x 10 hertz
d. 10 x 10 farads
e. 2.6 x 10 meters

Example. Write the following quantities using the nearest standard symbol

a. 220 x 10 V
b. 0.0047 x 10 F
c. 3900 x 10
d. 60 x 10 hertz
e. 10.6 x 10 s

Example. Write the following quantities using the nearest standard symbol.

a. 47 x 10
b. 13 x 10 A
c. 746 x 10 W
d. 14 x 10 s
e. 1.25 x 10 Hz

We can also convert from one prefix to another through the following procedure.

1. Replace the given prefix to another through the following procedure.

2. Relocate the decimal (left to right) while you adjust the power of ten.
3. When the power of ten matches the value of the desired prefix, replace it with the
prefix.

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

Example.

1. Express 0.1 milliamperes as an equivalent number of microamperes.

Solution.

First, we replace the given prefix with the equivalent power of ten as follows:

0.1 mA = 0.1 x 10 A

Next, we move the decimal until the power of ten matches the micro prefix (i.e. 10). In this
case, we will have to move the decimal point three places to the right.

0.1 x 10 A = 100 x 10 A

Finally, we substitute the equivalent prefix:

100 x 10 A = 100 A

APPLICATION:
1. Complete the following table.

Power of ten Prefix Symbol Magnitude

10

kilo

One-trillionth

10

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SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

2. Complete the following table

Quantity Unit Abbreviation Symbol

Frequency

Volts
R
W
Current

3. Express the following quantities in the forms indicated.

a. Express 15, 750 hertz as kilohertz

b. Express 0.0003 x 10 farads as microfarads
c. Express 0.00034 milliseconds as microseconds
d. Express 240 milliamperes as amperes

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

MODULE

ELECTRIC QUANTITIES AND COMPONENTS

In this Module

What is charge?
What is voltage?
What is current?
What is resistance?
What is Power?
What are the different standards used in Ohms Law?
What is resistor?
What is switches, fuses, and circuit breakers?

This tutorial will introduce the concept of what electricity. These are the basic building
blocks to understanding electricity and the information you will need. The contribution of
electricity the deals greatly affects worldwide technological development of the humanity.

At the completion of this module, you should be able to:

Students can familiarize the exact value of the resistor based on resistor color coding.
Students can express and analyze the process of solving electric quantities and
components using different format of formulas.

Are you prepared? Then start the lessons now!

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

LESSON

Charge, Voltage, Current, Resistance, and Power

OBJECTIVES:

Students can solve efficiently the problem solving in voltage, current, resistance, and
power.
Familiarize and understand formulas in interpreting problem solving.

INTRODUCTION:

Learning into the deeper issue among the electrical and electronic technology you have
to consider first to know the calculations and formulas of the electronic components in order
to determine the proper used and utilization of it. This lesson offers different techniques in
determining the missing value through the use of the appropriate formula for solving.

ACTIVITY:

Film viewing on the how charge, voltage, current, resistance, and power works.
Group discussion.
Oral recitation.

ANALYSIS:

Why you are required to learn accurate solving on the different value of charge, voltage,
current, resistance, and power?
Is it right to determine accurate formula in every given problems? If yes, why?

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

ABSTRACTION:

What is a charge?

Charge- an electrical charge is created when a material has more or less electron than proton.
An object is charged if it has either (negative charge) or a deficiency (positive charge) of
electrons. Charge is measured in coulombs.

Unit of charge

1 Coulomb is equal to the amount of charge produced by 6.25 x 10 electrons

Example

1. Calculate the number of electrons required to produce a charge of 5 C

Solution
No. of electrons = 5 x 6.25 x 10 = 31.25 x 10
2. If a certain material has a deficiency of 76.25 x 10 electrons, what is its charge?
Solution
Charge = No. of electrons
6.25 x 10

= 76.25 x 10 / 6.25 x 10

= 12.2

Example:

1. Compute the number of electrons required to produce a charge of 4.6 C

2. If a certain material has an excess of 36.432 x 10 electrons, what is its charge?

What is a voltage?

-The difference between the amount of charge on two points

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What is a current?

-current is the directed movement of charged particles-free electrons or positive and negative
ions.

Current is measured in amperes (A)

What is a resistance?

-resistance is the opposition to current flow.

What are the different materials used in electronics?

1. Insulators-are intended to prevent current flow

2. Conductors-have very low resistance (e.g. copper, aluminum, and gold)
3. Semiconductor-semiconductor material has more resistance than a conductor but less
than an insulator.
4. Superconductor-have no resistance at all (mercury, lead, and ceramic materials can
exhibit superconductivity. It can be used to make very strong electromagnets.

Unit of measurement for resistance

-Resistance is measured in ohm (). An ohm is defined as the amount of resistance required to
limit the current flow through a material to one ampere when one volt is applied across the
material.

What is Power?

Power is a measure of the rate at which energy is used.

Mechanical power is the rate of doing mechanical work. It is measured in horsepower.

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

Electrical power is the rate of using electrical energy. Electrical power is often evidenced as
heat. All electrical devices such as light bulbs, computers, microwave transmitters, and so on
dissipate power.

Unit of measurement for electrical power

-electrical power is measured in watts (W) and is the rate of using electrical energy. It can be
expressed mathematically by this equation

Power = energy/time

Where power is measured in watts (W), energy is measured in joules (J), and time is measured
in seconds.

Example:

1. What is the power if 500J of energy are used over a period of 6s?
2. How much energy is required to produce 50W of power in a 100-ms time period?
3. What is the power if 650J of energy are expended over a 300-ms interval?
4. During what time interval must 35J of energy be used if 760W are to be generated? In a
560-s time period?
5. If 120J of energy are used over a period of 600 ms, how much power is expended?
6. How many joules of energy are required to produce 350mW of power?
7. If 5000 J are used over a period of 2.5 s how much power is expended?
8. How many joules of energy are required to produce 100W of power in a 750-ms time
period?
9. If 746W is expended how much energy is used over a period of 4s time period?
10. How much time is expended when 55J of energy and 50W of power is used?

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 SULTAN KUDARAT STATE UNIVERSITY COLLEGE OF COMPUTER STUDIES________________________________

Electrical power expresses how many joules of work done in one second. Since both electrical
and mechanical powers are rates of doing work, we can equate them with this equation.

1 hp =746W

Example:

1. If a certain electrical motor delivers 75 hp, what is the required electrical power?
Solution: electrical power (W) = mechanical power (hp) x 746
2. Express 3.5 kW as an equivalent number of horsepower
3. Express 700hp as an equivalent number of watts
4. Express 23hp as an equivalent number of watts?
5. How much electrical power is required to deliver 24hp
6. Express 75hp as an equivalent number of watts.
7. Express 5 MW as an equivalent number of horsepower.
8. How much electrical power is required when 0.003hp is used?
9. Express 0.0056hp as an equivalent number of watts.
10. Express 98 kW as an equivalent number of horsepower.

_______________________________________________COURSE PACK IN BASIC ELECTRICITY 24