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• What is the purpose of the resistor color code?


  It is used to indicate the nominal value and tolerance of resistors.
• How is the power rating of a resistor determined?

  The power rating is not indicated in the color code and must be determined by experience using the physical size of the resistor.
• How many color bands are used for resistors with ±5% or ±10% tolerance?

  Four color bands are used.
• How many color bands are used for resistors with ±1% or ±2% tolerance?

  Five color bands are used.
• What does the color code for a 4-band resistor represent?

  • 1st Band: 1st Significant Digit
  • 2nd Band: 2nd Significant Digit
  • 3rd Band: Multiplier
  • 4th Band: Tolerance
• How do you determine the nominal resistance value from a 4-band resistor?

  You use the first two bands for significant digits, the third band as a multiplier, and the fourth band for tolerance.
• What is the nominal value and tolerance for a resistor with color bands Brown, Black, Red, and Gold?

  The nominal value is $1,000 \, \Omega$ with a tolerance of ±5%.
• What is the typical way to express resistance values for resistors?

  Resistance values are typically expressed in kΩ if the resistance is ≥ 1,000 Ω, and in MΩ if the resistance is ≥ 1,000,000 Ω.
• What is the conversion table used for in resistor values?

  • Converts resistance values from Ω to kΩ or MΩ
  • Helps in understanding the scale of resistance
• How do you calculate the nominal resistance value for a resistor with a nominal value of $10 \times 10^2 \, \Omega$?


  The nominal resistance value is $1,000 \, \Omega$.
• What is the nominal resistance and tolerance for a resistor with color bands Yellow, Violet, Orange, and Gold?

  The nominal resistance is $47,000 \, \Omega$ with a tolerance of ±5%.
• How do you determine the nominal resistance value for a resistor with color bands Orange, Orange, Green, and Silver?

  The nominal resistance value is $3,500,000 \, \Omega$ with a tolerance of ±10%.
• How do you read the color code on a resistor?

  • For 4-band resistors, the last band (gold or silver) indicates tolerance.
  • For 5-band resistors, the first band is the one closest to the lead.
• What color band indicates a tolerance of ±10%?

  Silver.
• What color band indicates a tolerance of ±5%?

  Gold.
• What is the significance of the first band in a 5-band resistor?

  The first band indicates the first significant digit of the resistance value.
• How do you specify the color code for a resistor with a nominal value of $2.5M \, \Omega$ and a tolerance of ±1%?


  The color code would be Green, Black, Red, Yellow, and Brown.
• What is the nominal resistance and tolerance for a resistor with color bands Brown, Green, Red, and Gold?

  The nominal resistance is $1,500 \, \Omega$ with a tolerance of ±5%.
• What are the steps to determine the color code for a resistor?

  1. Identify the number of bands (4 or 5).
  2. Use the color code table to find significant digits and multiplier.
  3. Determine tolerance from the last band.
• What is the nominal resistance value for a resistor with color bands Red, Green, Blue, and Silver?

  The nominal resistance is $2,500,000 \, \Omega$ with a tolerance of ±10%.
• What is the nominal resistance value for a resistor with color bands Black, Brown, Red, and Gold?

  The nominal resistance is $1,000 \, \Omega$ with a tolerance of ±5%.
• What is the final takeaway about working with the resistor color code?

  • Understanding the color code is essential for identifying resistor values.
  • It simplifies the process of working with electronic components.