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Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 521 · 40 questions
TalentJR

Remember (Digit, digit, zeros): black 0 · brown 1 · red 2 · orange 3 · yellow 4 · green 5 · blue 6 · violet 7 · grey 8 · white 9. Band 1 and band 2 = two digits; band 3 = number of zeros to add. Examples: brown-black-red = 1000 Ω; yellow-violet-brown = 470 Ω; red-red-red = 2200 Ω = 2.2 kΩ.

NameDateTime takenScore ___ / 40
  1. 1.🌈 In the resistor colour code, which number does grey stand for?
  2. 2.🌈 A resistor has the colour bands red, white, orange. What is its value (in ohms)?
  3. 3.🌈 A resistor has the colour bands orange, grey, orange. What is its value (in ohms)?
  4. 4.🌈 In the resistor colour code, which number does blue stand for?
  5. 5.🌈 A gold fourth band on a resistor means the value may be off by … (a) 50 % (b) 25 % (c) 5 % (d) 0 %
  6. 6.🌈 A resistor has the colour bands white, black, yellow. What is its value in kilo-ohms (kΩ)? =
  7. 7.🌈 A resistor has the colour bands red, grey, orange. What is its value (in ohms)?
  8. 8.🌈 Which band is read first on a resistor? (a) the widest gap (b) any band (c) the gold band (d) the one nearest an end
  9. 9.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 75000 Ω resistor? (a) violet-green-yellow (b) green-violet-orange (c) violet-green-orange (d) violet-green-red
  10. 10.🌈 In the resistor colour code, which number does orange stand for?
  11. 11.🌈 A resistor has the colour bands green, white, black. What is its value (in ohms)?
  12. 12.🌈 A resistor has the colour bands violet, white, black. What is its value (in ohms)?
  13. 13.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 810 Ω resistor? (a) grey-brown-brown (b) brown-grey-brown (c) grey-brown-black (d) grey-brown-red
  14. 14.🌈 A resistor has the colour bands orange, green, brown. What is its value (in ohms)?
  15. 15.🌈 A resistor has the colour bands yellow, red, black. What is its value (in ohms)?
  16. 16.🌈 A resistor has the colour bands green, black, red. What is its value (in ohms)?
  17. 17.🌈 A resistor has the colour bands grey, black, red. What is its value in kilo-ohms (kΩ)? =
  18. 18.🌈 A resistor has the colour bands blue, red, red. What is its value in kilo-ohms (kΩ)? =
  19. 19.🌈 A resistor has the colour bands red, red, red. What is its value (in ohms)?
  20. 20.🌈 In the resistor colour code, which number does green stand for?
  21. 21.🌈 A resistor has the colour bands red, brown, black. What is its value (in ohms)?
  22. 22.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7700 Ω resistor? (a) violet-violet-brown (b) violet-violet-red (c) violet-grey-red (d) violet-violet-orange
  23. 23.🌈 In the resistor colour code, which number does yellow stand for?
  24. 24.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 1600 Ω resistor? (a) blue-brown-red (b) brown-blue-brown (c) brown-blue-orange (d) brown-blue-red
  25. 25.🌈 A resistor has the colour bands violet, white, brown. What is its value (in ohms)?
  26. 26.🌈 In the resistor colour code, which number does violet stand for?
  27. 27.🌈 A resistor has the colour bands yellow, black, orange. What is its value in kilo-ohms (kΩ)? =
  28. 28.🌈 A resistor has the colour bands orange, green, orange. What is its value in kilo-ohms (kΩ)? =
  29. 29.🌈 A resistor has the colour bands brown, black, brown. What is its value (in ohms)?
  30. 30.🌈 A resistor has the colour bands red, white, red. What is its value in kilo-ohms (kΩ)? =
  31. 31.🌈 A resistor has the colour bands violet, red, yellow. What is its value in kilo-ohms (kΩ)? =
  32. 32.🌈 A resistor has the colour bands blue, black, red. What is its value in kilo-ohms (kΩ)? =
  33. 33.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 57 Ω resistor? (a) blue-violet-black (b) green-violet-black (c) green-violet-brown (d) violet-green-black
  34. 34.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 79 Ω resistor? (a) violet-white-brown (b) violet-white-black (c) grey-white-black (d) white-violet-black
  35. 35.🌈 A resistor has the colour bands grey, blue, red. What is its value in kilo-ohms (kΩ)? =
  36. 36.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 260 Ω resistor? (a) blue-red-brown (b) red-blue-red (c) red-blue-black (d) red-blue-brown
  37. 37.🌈 In the resistor colour code, which number does white stand for?
  38. 38.🌈 In the resistor colour code, which number does brown stand for?
  39. 39.🌈 A resistor has the colour bands violet, grey, black. What is its value (in ohms)?
  40. 40.🌈 In the resistor colour code, which number does red stand for?

Answer key

  1. 8
  2. 29000
  3. 38000
  4. 6
  5. 5 %
  6. 900
  7. 28000
  8. the one nearest an end
  9. violet-green-orange
  10. 3
  11. 59
  12. 79
  13. grey-brown-brown
  14. 350
  15. 42
  16. 5000
  17. 8
  18. 6.2
  19. 2200
  20. 5
  21. 21
  22. violet-violet-red
  23. 4
  24. brown-blue-red
  25. 790
  26. 7
  27. 40
  28. 35
  29. 100
  30. 2.9
  31. 720
  32. 6
  33. green-violet-black
  34. violet-white-black
  35. 8.6
  36. red-blue-brown
  37. 9
  38. 1
  39. 78
  40. 2

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