Resistor Color Code Chart Tutorial Review - Physics

Summary

This video explains how to determine the value of a resistor using the resistor color code. The first two colors represent the significant digits, the third color is the multiplier, and the fourth color indicates tolerance. The video demonstrates several examples: a resistor with red, yellow, orange, and gold bands, another with green, blue, red, and silver, and finally, one with yellow, violet, green, and no color. It walks through the process of calculating the resistance and the tolerance range, giving a clear explanation of how resistance may vary within a specific tolerance percentage.

Takeaways

• 📏 The resistor color code helps determine the value of a resistor.
• 🎨 The first color represents the first digit of the resistor's value.
• 🟥 In the example, red is the first color, corresponding to the digit 2.
• 🟨 Yellow is the second color, representing the second digit, which is 4.
• 🟧 Orange is the third color, representing a multiplier of 10^3.
• 🏅 The last color, gold, indicates a tolerance of ±5%.
• 📐 The calculated resistance is 24,000 ohms, or 24 kiloohms, with a tolerance of ±5%.
• 🧮 A 10% tolerance resistor example was provided, with a calculated range of values between 5,040 ohms and 6,160 ohms.
• 🔢 A 20% tolerance example gave a resistor value of 4.7 megaohms with a possible range between 3.76 megaohms and 5.64 megaohms.
• 🎓 Resistors are typically expressed in kiloohms or megaohms when their values are large.

Q & A

What does the first color in the resistor color code represent?

The first color in the resistor color code represents the first digit of the resistor's value.

How do you determine the second digit in a resistor's value using the color code?

The second digit of a resistor's value is determined by the second color in the resistor color code, which corresponds to a number based on a color chart.

What is the purpose of the third color in the resistor color code?

The third color represents the multiplier, which is a factor by which the two-digit number is multiplied to calculate the resistor’s total value.

What do the colors gold and silver signify in the resistor color code?

Gold and silver represent the tolerance of the resistor. Gold indicates a tolerance of ±5%, while silver indicates a tolerance of ±10%.

How do you calculate the total resistance if the third color is orange?

If the third color is orange, the multiplier is 10^3 or 1,000. You multiply the two-digit number by 1,000 to get the total resistance.

How is the tolerance used to determine the possible range of resistance values?

The tolerance, expressed as a percentage, shows how much the actual resistance can vary from the nominal value. For example, a 5% tolerance means the actual resistance can be ±5% of the calculated value.

If the resistor has the colors red, yellow, orange, and gold, what is its value and tolerance?

The first color red corresponds to 2, the second color yellow corresponds to 4, and the third color orange is a multiplier of 1,000. The value is 24,000 ohms or 24 kiloohms with a tolerance of ±5% since the last color is gold.

How do you convert resistance from ohms to kiloohms?

To convert resistance from ohms to kiloohms, divide the value in ohms by 1,000. For example, 24,000 ohms is equivalent to 24 kiloohms.

How would you calculate the range of resistance for a resistor with a value of 5,600 ohms and 10% tolerance?

First, calculate 10% of 5,600 ohms, which is 560 ohms. The actual resistance could range between 5,600 - 560 = 5,040 ohms and 5,600 + 560 = 6,160 ohms.

What does the absence of a color for the tolerance indicate?

If there is no color for the tolerance, it indicates a tolerance of ±20%, which is a larger range for potential variation in the resistor's actual value.

Outlines

00:00

🎨 Understanding Resistor Color Codes and Calculating Resistance

This paragraph explains how to interpret the resistor color code to determine the value of a resistor. It walks through an example using the colors red, yellow, orange, and gold. The first two colors represent the significant digits (red = 2, yellow = 4), the third color (orange) acts as a multiplier (10^3 or 1000), and the last color (gold) indicates tolerance (±5%). The resistance is calculated as 24,000 ohms or 24 kiloohms, with a tolerance of ±5%. The actual resistance may range from 22.8 kΩ to 25.2 kΩ.

05:01

🔢 Example of Resistance Calculation with Different Colors

In this paragraph, the script provides another example using the colors green, blue, red, and silver to calculate the resistance. Green corresponds to the first digit (5), blue to the second digit (6), red as the multiplier (10^2 or 100), and silver for a tolerance of ±10%. The total resistance is calculated as 5600 ohms, with a range between 5040 and 6160 ohms. The actual resistance value could vary within this range due to the 10% tolerance.

10:01

🟣 Megaohms Calculation Using Resistor Color Codes

The script provides yet another example involving the colors yellow, violet, green, and no color (indicating 20% tolerance). Yellow represents the first digit (4), violet the second digit (7), and green the multiplier (10^5 or 100,000). This results in a resistance of 4.7 megaohms. With a 20% tolerance, the resistance can vary between 3.76 megaohms and 5.64 megaohms. The actual resistance is likely around 4.7 megaohms, but can fluctuate within this range.

Keywords

💡Resistor

A resistor is a passive electrical component that limits the flow of electrical current in a circuit. In the video, the main focus is determining the value of a resistor based on its color code, which indicates its resistance value and tolerance. Resistors are measured in ohms (Ω), and their value is critical for controlling current in circuits.

💡Color Code

The color code is a standardized system used to indicate the value of a resistor. Each color represents a specific number or multiplier, helping to determine the resistor's resistance. In the video, the speaker uses examples of color sequences such as red, yellow, and orange to explain how these colors translate into numerical values.

💡Multiplier

The multiplier is the factor by which the first two digits of a resistor's value are multiplied to determine its total resistance. In the video, the multiplier is represented by the third color band on the resistor, and it's essential for calculating the final resistance value. For example, the orange color band represents a multiplier of 1,000.

💡Tolerance

Tolerance indicates how much a resistor’s actual resistance can vary from its stated value. It is represented by the fourth color band, with common values like gold (±5%) and silver (±10%). In the video, tolerance helps calculate the possible range of resistance, allowing for slight variations in manufacturing.

💡Ohms (Ω)

Ohms is the unit of measurement for electrical resistance. The higher the ohms, the more the resistor resists the flow of electrical current. In the video, the resistance of various resistors is calculated in ohms, ranging from 24,000 ohms (or 24 kiloohms) to 5.6 kiloohms, depending on the color code.

💡Kiloohms

Kiloohms (kΩ) are a larger unit of resistance, where 1 kiloohm equals 1,000 ohms. The video demonstrates converting high resistor values, like 24,000 ohms, into kiloohms to simplify the measurement. Kiloohms are typically used when resistor values are large enough to warrant the use of higher units.

💡Megaohms

Megaohms (MΩ) are even larger units of resistance, where 1 megaohm equals 1,000,000 ohms. In the video, an example calculation leads to a resistance value of 4.7 megaohms, showing that resistors can have extremely high resistance levels when dealing with larger circuits.

💡First Digit

The first digit is the number represented by the first color band in the resistor's color code. In the video, for instance, the first color red corresponds to the number 2. This number forms part of the base value of the resistor's resistance, which is then multiplied by the multiplier.

💡Second Digit

The second digit is the number represented by the second color band in the resistor's color code. It works alongside the first digit to form the base resistance value. For example, in the video, the second color yellow corresponds to 4, so a resistor with red and yellow bands would have a base value of 24.

💡Range of Resistance

The range of resistance refers to the possible variation in the actual resistance of a resistor due to its tolerance. In the video, the speaker explains how to calculate this range by applying the tolerance percentage to the base resistance. For instance, a resistor with a base value of 5,600 ohms and a 10% tolerance can vary between 5,040 and 6,160 ohms.

Highlights

Introduction to determining resistor values using the resistor color code.

First color from left corresponds to the first digit of the resistor value.

Example 1: First color is red, corresponding to 2 as the first digit.

Second color corresponds to the second digit; yellow represents 4.

Third color represents the multiplier; orange corresponds to a multiplier of 1,000.

Gold as the fourth color represents a 5% tolerance for the resistor.

The resistance value is calculated as 24,000 ohms or 24 kiloohms.

Tolerance range calculated: resistance can vary between 22.8k ohms and 25.2k ohms.

Example 2: First color is green (5), second is blue (6), third is red (100), and tolerance is silver (10%).

Calculated resistance is 5,600 ohms, and the tolerance range is between 5,040 and 6,160 ohms.

Example 3: First color is yellow (4), second is violet (7), third is green (100,000), and no tolerance color (20%).

Resistance is 4.7 megaohms, with a tolerance range between 3.76 megaohms and 5.64 megaohms.

Explains how to multiply for the tolerance range by calculating the percentage of resistance.

Demonstrates converting resistance into kiloohms and megaohms depending on the size of the value.

Encouragement for viewers to apply the same method for their own resistor calculations.

Transcripts

in this video we're going to talk about

how to use the resistor color code in

order to determine the value of a

resistor so the first

color reading it from left to right is

for the first

digit so the first color is

red well let's actually use the color

red the second color is uh

yellow the third color let's just say

it's uh

orange the last color is for the

tolerance it's usually either gold

silver or no color so let's say this is

gold I'm going to put a g for

gold so what you need to do is when you

have the first color which is red look

for the number in a table so red

corresponds to

two that's the first digit the second

color yellow correlates to the second

digit and based on the table yellow

is associated with

four so you're going to have 2 four or

24 o or

orange is three but the third number is

the

multiplier the first two letters

corresponds to the first two digits the

third letter corresponds to the multiply

which is 10 the 3r so this is 24 * 10 3r

and the last color is the tolerance

which is usually gold silver or no color

so since we have gold the tolerance is

5% so it's going to be plus or

minus

5% now what is 10 the

3 10 the 3 is basically 10 * 10 * 10

three times or just a

th000 so 24 * 1,000 is 24,000

so that's the value of the resistance

it's 24,000

ohms now because this number is so large

let's convert it to

kiloohms to convert it to kiloohms just

divide by a

th000 1 kiloohm is equal to 1,000

ohms so therefore this is about 24

kiloohms plus or minus

5% now let's go ahead and calculate the

range

so what we want to do is find out what

5% of the resistance is equal

to so right now we have

2.4 actually

24

kiloohms plus or minus

5% so let's multiply

24K by

05 which is going to be 5% of it

and that's about 1.2

kiloohms so the actual resistance can

vary

between 1.2 kiloohms from 24 kohms so it

could be 24 minus

1.2 so it can be a 22.8 kiloohms on the

low

side

or it can be 24 +

1.2 which will be

25.2

kilms So based on this information the

resistance is about 24 kilms but the

actual value can be anywhere between

22.8 and

25.2 and so you should always check the

tolerance level to see where the true

resistance May lie

now it's your turn go ahead and

calculate the value of this resistor

determine the tolerance level and also

the range in which the true resistance

May

lie so the first color is green the

second is blue the third is red and the

fourth which is the tolerance is

silver so the first color is associated

with the first digit green has a number

of five

so the first digit is

five next we have blue which is

associated with six the second color is

for the second digit and then we're

going to

multiply now the third color is for the

multiplier and since we have red the

multiplier for red is 10^ squ so we're

going to multiply by 10 to the 2

power and then the last color is

associated with the tolerance for silver

the tolerance is 10% so it's going to be

plus or minus

10% 10^ 2 or 10 * 10 is

100 so 56 * 100 is

5600 so that's the resistance it's 5600

ohms plus or minus

10% now let's calculate 10% of

5600 so

5600 * 10% which

is10 to convert a percentage to a

decimal you can divide by 100 or move

the decimal point two units to the

left 5600 time10 is

560 so basically we need to add or

subtract by

560 5600 +

560 is

6,160 and 5600 minus

560 that's that's

540 so the actual resistance could be

anywhere between 5,40 ohms and 6160

ohms with the average value being around

5600 so this is the

resistance and this is the range in

which the actual resistance can be

here's another one you could try go

ahead and calculate the resistance using

the resistor color code and determine

the tolerance and also the range in

which the true resistance can lie so

feel free to pause the video and see

what the solution is going to

be unpause it whenever you're ready so

the first color is yellow the second one

is purple or Violet the third one is

green and the last one has no color

so the first color is associated with

the first digit so yellow corresponds to

four the second color is for the second

digit Violet corresponds to

seven the third color is for the

multiplier green has a multiplier of 10

5ifth and the last one is for the

tolerance level for no color the

tolerance is very high it's 20% that is

plus or minus

20% but let's deal with the percentage

later what's 47 * 10

5 10 5 is basically

100,000 it's a one with five zeros and

if you multiply 47 by

100,000 that's going to be 4.7

million or 4 million

700,000 so that is the resistance level

in ohms which if you put it back in

scientific notation by moving the

decimal six units to the

left this is equivalent to

4.7 time 10 6

ohms now 10 6 is basically a million

which

represents mega mega is equal to 10 6 so

this can write it as

4.7

megaohms anytime you have a value above

a th000 it's common to write it in terms

of kiloohms if it's above a million you

want to use Mega

ohms so now what is

20% of

4.7 so if we multiply

4.7 by 020 don't forget to divide 20 by

100

this is going to give us

.94 so the resistance could be anywhere

between 4.7 megaohms plus or minus

.94 megaohms the unit has to be the

same so the lowest value is going to be

4.7 minus

0.94 which is 3.76

megaohms and the highest value

is

4.7 plus

0.94 which is

5.64

megaohms so the average

resistance for this particular resistor

is about 4.7

megaohms the tolerance level is

20% and the range is between 3.76

and

5.64 so this resistor can have any

value in this range but most likely it's

going to be around 4.7 Mega ohs