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.