Electrical Resistors: What Is Resistor?

Name: Laica Gonzaga Eroy Date: October 2, 2021
Yr&Sec: 2 – BAT – A
Laboratory No. 2
Electrical Resistors
I. Introduction
The resistors in your parts kit have colored stripes that indicate what their
resistance values are. There is a different color combination for each resistance
value. For example, the color code for the 470 Ω resistor is yellow-violet-brown.
There may be a fourth stripe that indicates the resistor's tolerance.
As the electronics industry evolved, one of the first things that the industry’s players
did was standardize the color code marking on resistors. Resistor manufacturers
adopted this color code.
WHAT IS RESISTOR?
The resistor is a passive electrical component that creates resistance in the flow
of electric current. In almost all electrical networks and electronic circuits they can
be found. The resistance is measured in ohms (Ω). An ohm is the resistance that
occurs when a current of one ampere (A) passes through a resistor with a one volt
(V) drop across its terminals. The current is proportional to the voltage across the
terminal ends. This ratio is represented by Ohm’s law:
$$R = \frac{V}{I}$$
Resistors are used for many purposes. A few examples include limiting electric
current, voltage division, heat generation, matching and loading circuits, gain
control, and setting time constants. They are commercially available with resistance
values over a range of more than nine orders of magnitude. They can be used as
electric brakes to dissipate kinetic energy from trains, or be smaller than a square
millimeter for electronics.
SIGNIFICANCE OF RESISTOR
Resistors ensure components receive the proper voltage by creating a voltage

drop, and they can protect a component from voltage spikes. Each component in an
electrical circuit, like a light or a switch, requires a specific voltage.
RESISTOR CHARACTERISTICS
Dependent on the application, the electrical engineer specifies different

properties of the resistor. The primary purpose is to limit the flow of electrical
current; therefore the key parameter is the resistance value. The manufacturing
accuracy of this value is indicated with the resistor tolerance and is expressed as a
percentage of the resistance value (for example ±5%).
Many other parameters that affect the resistance value can be specified, such as
long term stability or the temperature coefficient. The temperature coefficient,
usually specified in high precision applications, is determined by the resistive
material as well as the mechanical design.
In high frequency circuits, such as in radio electronics, the parasitic capacitance

and inductance can lead to undesired effects. Foil resistors generally have a low
parasitic reactance, while wire wound resistors are among the worst. For accurate
applications such as audio amplifiers, the electric noise of the resistor must be as
low as possible. This is often specified as microvolts noise per volt of applied voltage,
for a 1 MHz bandwidth. For high power applications the power rating is important.
This specifies the maximum operating power the component can handle without
altering the properties or damage.
The power rating is usually specified in free air at room temperature. Higher
power ratings require a larger size and may even require heat sinks. Many other
characteristics can play a role in the design specification. Examples are the maximum
voltage or the pulse stability. In situations where high voltage surges could occur,
this is an important characteristic.
Sometimes not only the electrical properties are important, but the designer also
has to consider the mechanical robustness in harsh environments. Military
standards sometimes offer guidance to define the mechanical strength or the failure
rate.
OBJECTIVES
 To observe the color of the bands

 To solve the resistor value
 To know the resistors value
II. Gathered Data/Observation

a. Resistor 1
BAND COLOR CODE NUMERIC VALUE

st
1 Band Brown 1
nd
2 Band Black 0
rd
3 Band Gold 0.1 Ω
4th band Gold +/- 5%
th
5 Band
RESISTOR VALUE: _______1.0 or 1 Ω _________ TOLERANCE __+/-5%__
(PASTE THE PICTURE OF RESISTOR)
b. Resistor 2

1st Band Red 2
nd
2 Band Black 0
rd
3 Band Brown 10 Ω
th
4 band Gold +/- 5%
5th Band
RESISTOR VALUE: ________200 Ω ___________ TOLERANCE __+/-5%__
c. Resistor 3

st
1 Band Brown 10
nd
2 Band Black 0
rd
3 Band Brown 10 Ω
th
4 band Gold +/-5%
5th Band
RESISTOR VALUE: _____1000 or 1K Ω _________ TOLERANCE __+/-5%__
d. Resistor 4

1st Band Yellow 4
nd
2 Band Blue 6
rd
3 Band Gold 0.1 Ω
th
4 band Gold +/-5%
5th Band
RESISTOR VALUE: _________4.6 Ω ___________ TOLERANCE __+/-5%__
e. Resistor 5

1st Band Red 2
nd
2 Band Red 2
rd
3 Band Gold 0.1 Ω
th
4 band Gold +/-5%
th
5 Band
RESISTOR VALUE: _________2.2 Ω____________ TOLERANCE __+/-5%__
f. Resistor 6

1st Band Brown 10
nd
2 Band Red 2
rd
3 Band Brown 10 Ω
th
4 band Gold +/-5%
5th Band
RESISTOR VALUE: _____1020 or 1.02K Ω _______ TOLERANCE __+/-5%__
g. Resistor 7

1st Band Red 2
nd
2 Band Black 0
rd
3 Band Black 1Ω
th
4 band Gold +/-5%
th
5 Band
RESISTOR VALUE: _________20 Ω_____________ TOLERANCE __+/-5%__
h. Resistor 8

1st Band Red 2
nd
2 Band Blue 6
rd
3 Band Yellow 4Ω
th
4 band Gold +/-5%
5th Band
RESISTOR VALUE: _________104 Ω ____________ TOLERANCE __+/-5%__
i. Resistor 9

1st Band Red 2
nd
2 Band Red 2
rd
3 Band Brown 10
th
4 band Gold +/-5%
th
5 Band
RESISTOR VALUE: _________220 Ω ____________ TOLERANCE __+/-5%__
j. Resistor 10

st
1 Band Green 5
nd
2 Band Black 0
rd
3 Band Silver 0.01
th
4 band Gold +/-5%
5th Band
RESISTOR VALUE: _______0.5 or_.5 Ω TOLERANCE __+/-5%__
___________
III. Summary & Conclusion
It's tough to read resistors by their bands at first, and it's even more
perplexing if you don't understand how to solve the values of each resistor. As a result,
resistors must be handled carefully since they might be hazardous when used in a
circuit.

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Name: Laica Gonzaga Eroy Date: October 2, 2021

Resistors ensure components receive the proper voltage by creating a voltage

Dependent on the application, the electrical engineer specifies different

In high frequency circuits, such as in radio electronics, the parasitic capacitance

 To observe the color of the bands

II. Gathered Data/Observation

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

BAND COLOR CODE NUMERIC VALUE

III. Summary & Conclusion

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