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Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 517 · 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.

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  1. 1.🌈 A resistor has the colour bands red, green, orange. What is its value (in ohms)?
  2. 2.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 32 Ω resistor? (a) yellow-red-black (b) orange-red-brown (c) red-orange-black (d) orange-red-black
  3. 3.🌈 A gold fourth band on a resistor means the value may be off by … (a) 5 % (b) 25 % (c) 50 % (d) 0 %
  4. 4.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 34000 Ω resistor? (a) orange-yellow-orange (b) orange-yellow-red (c) yellow-orange-orange (d) orange-yellow-yellow
  5. 5.🌈 Which band is read first on a resistor? (a) the gold band (b) the one nearest an end (c) any band (d) the widest gap
  6. 6.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7200 Ω resistor? (a) violet-red-brown (b) red-violet-red (c) violet-red-orange (d) violet-red-red
  7. 7.🌈 A resistor has the colour bands yellow, violet, black. What is its value (in ohms)?
  8. 8.🌈 A resistor has the colour bands violet, orange, orange. What is its value (in ohms)?
  9. 9.🌈 A resistor has the colour bands orange, brown, black. What is its value (in ohms)?
  10. 10.🌈 A resistor has the colour bands grey, black, yellow. What is its value in kilo-ohms (kΩ)? =
  11. 11.🌈 A resistor has the colour bands grey, violet, orange. What is its value (in ohms)?
  12. 12.🌈 In the resistor colour code, which number does violet stand for?
  13. 13.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 3800 Ω resistor? (a) orange-grey-red (b) orange-grey-orange (c) grey-orange-red (d) orange-grey-brown
  14. 14.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7800 Ω resistor? (a) violet-grey-brown (b) grey-violet-red (c) violet-grey-orange (d) violet-grey-red
  15. 15.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 40000 Ω resistor? (a) yellow-black-yellow (b) yellow-black-red (c) green-yellow-orange (d) yellow-black-orange
  16. 16.🌈 A resistor has the colour bands orange, red, yellow. What is its value in kilo-ohms (kΩ)? =
  17. 17.🌈 A resistor has the colour bands yellow, brown, red. What is its value (in ohms)?
  18. 18.🌈 A resistor has the colour bands red, green, yellow. What is its value in kilo-ohms (kΩ)? =
  19. 19.🌈 A resistor has the colour bands brown, red, red. What is its value (in ohms)?
  20. 20.🌈 A resistor has the colour bands brown, red, orange. What is its value in kilo-ohms (kΩ)? =
  21. 21.🌈 A resistor has the colour bands violet, green, orange. What is its value (in ohms)?
  22. 22.🌈 In the resistor colour code, which number does black stand for?
  23. 23.🌈 A resistor has the colour bands red, white, red. What is its value in kilo-ohms (kΩ)? =
  24. 24.🌈 A resistor has the colour bands grey, grey, red. What is its value (in ohms)?
  25. 25.🌈 A resistor has the colour bands grey, green, orange. What is its value (in ohms)?
  26. 26.🌈 A resistor has the colour bands violet, blue, yellow. What is its value in kilo-ohms (kΩ)? =
  27. 27.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 38 Ω resistor? (a) yellow-grey-black (b) grey-orange-black (c) orange-grey-brown (d) orange-grey-black
  28. 28.🌈 A resistor has the colour bands brown, green, red. What is its value (in ohms)?
  29. 29.🌈 In the resistor colour code, which number does yellow stand for?
  30. 30.🌈 A resistor has the colour bands green, brown, orange. What is its value (in ohms)?
  31. 31.🌈 A resistor has the colour bands orange, grey, orange. What is its value (in ohms)?
  32. 32.🌈 A resistor has the colour bands white, green, yellow. What is its value in kilo-ohms (kΩ)? =
  33. 33.🌈 A resistor has the colour bands blue, black, red. What is its value in kilo-ohms (kΩ)? =
  34. 34.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 16 Ω resistor? (a) red-blue-black (b) blue-brown-black (c) brown-blue-black (d) brown-blue-brown
  35. 35.🌈 A resistor has the colour bands violet, red, yellow. What is its value in kilo-ohms (kΩ)? =
  36. 36.🌈 A resistor has the colour bands green, grey, red. What is its value in kilo-ohms (kΩ)? =
  37. 37.🌈 In the resistor colour code, which number does orange stand for?
  38. 38.🌈 A resistor has the colour bands brown, brown, red. What is its value (in ohms)?
  39. 39.🌈 A resistor has the colour bands white, grey, orange. What is its value (in ohms)?
  40. 40.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 210 Ω resistor? (a) red-brown-brown (b) red-brown-black (c) brown-red-brown (d) red-brown-red

Answer key

  1. 25000
  2. orange-red-black
  3. 5 %
  4. orange-yellow-orange
  5. the one nearest an end
  6. violet-red-red
  7. 47
  8. 73000
  9. 31
  10. 800
  11. 87000
  12. 7
  13. orange-grey-red
  14. violet-grey-red
  15. yellow-black-orange
  16. 320
  17. 4100
  18. 250
  19. 1200
  20. 12
  21. 75000
  22. 0
  23. 2.9
  24. 8800
  25. 85000
  26. 760
  27. orange-grey-black
  28. 1500
  29. 4
  30. 51000
  31. 38000
  32. 950
  33. 6
  34. brown-blue-black
  35. 720
  36. 5.8
  37. 3
  38. 1100
  39. 98000
  40. red-brown-brown

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