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Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 95 · 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.🌈 A resistor has the colour bands violet, white, red. What is its value (in ohms)?
  2. 2.🌈 A resistor has the colour bands blue, brown, brown. What is its value (in ohms)?
  3. 3.🌈 A resistor has the colour bands green, brown, red. What is its value in kilo-ohms (kΩ)? =
  4. 4.🌈 In the resistor colour code, which number does black stand for?
  5. 5.🌈 A resistor has the colour bands grey, violet, yellow. What is its value in kilo-ohms (kΩ)? =
  6. 6.🌈 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
  7. 7.🌈 In the resistor colour code, which number does blue stand for?
  8. 8.🌈 A resistor has the colour bands red, brown, red. What is its value (in ohms)?
  9. 9.🌈 A resistor has the colour bands violet, yellow, black. What is its value (in ohms)?
  10. 10.🌈 A resistor has the colour bands yellow, white, red. What is its value (in ohms)?
  11. 11.🌈 A resistor has the colour bands green, green, brown. What is its value (in ohms)?
  12. 12.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 570 Ω resistor? (a) green-violet-red (b) green-violet-black (c) violet-green-brown (d) green-violet-brown
  13. 13.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 3200 Ω resistor? (a) orange-red-orange (b) red-orange-red (c) orange-red-red (d) orange-red-brown
  14. 14.🌈 A resistor has the colour bands orange, blue, red. What is its value in kilo-ohms (kΩ)? =
  15. 15.🌈 A resistor has the colour bands green, orange, red. What is its value in kilo-ohms (kΩ)? =
  16. 16.🌈 In the resistor colour code, which number does violet stand for?
  17. 17.🌈 A resistor has the colour bands brown, green, red. What is its value (in ohms)?
  18. 18.🌈 A gold fourth band on a resistor means the value may be off by … (a) 50 % (b) 25 % (c) 5 % (d) 0 %
  19. 19.🌈 A resistor has the colour bands orange, violet, brown. What is its value (in ohms)?
  20. 20.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 89 Ω resistor? (a) grey-white-black (b) white-white-black (c) white-grey-black (d) grey-white-brown
  21. 21.🌈 In the resistor colour code, which number does green stand for?
  22. 22.🌈 A resistor has the colour bands orange, yellow, brown. What is its value (in ohms)?
  23. 23.🌈 A resistor has the colour bands orange, orange, red. What is its value in kilo-ohms (kΩ)? =
  24. 24.🌈 A resistor has the colour bands brown, red, black. What is its value (in ohms)?
  25. 25.🌈 A resistor has the colour bands brown, green, red. What is its value in kilo-ohms (kΩ)? =
  26. 26.🌈 A resistor has the colour bands blue, orange, red. What is its value in kilo-ohms (kΩ)? =
  27. 27.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 250 Ω resistor? (a) red-green-black (b) green-red-brown (c) red-green-brown (d) red-green-red
  28. 28.🌈 A resistor has the colour bands brown, black, orange. What is its value (in ohms)?
  29. 29.🌈 A resistor has the colour bands white, black, red. What is its value (in ohms)?
  30. 30.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 230 Ω resistor? (a) red-orange-black (b) orange-red-brown (c) red-orange-red (d) red-orange-brown
  31. 31.🌈 A resistor has the colour bands brown, grey, orange. What is its value in kilo-ohms (kΩ)? =
  32. 32.🌈 A resistor has the colour bands brown, grey, brown. What is its value (in ohms)?
  33. 33.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 49000 Ω resistor? (a) yellow-white-orange (b) yellow-white-yellow (c) yellow-white-red (d) white-yellow-orange
  34. 34.🌈 A resistor has the colour bands orange, violet, orange. What is its value in kilo-ohms (kΩ)? =
  35. 35.🌈 A resistor has the colour bands grey, red, black. What is its value (in ohms)?
  36. 36.🌈 A resistor has the colour bands red, green, orange. What is its value in kilo-ohms (kΩ)? =
  37. 37.🌈 A resistor has the colour bands violet, blue, orange. What is its value (in ohms)?
  38. 38.🌈 In the resistor colour code, which number does yellow stand for?
  39. 39.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 110 Ω resistor? (a) brown-brown-red (b) brown-brown-black (c) brown-red-brown (d) brown-brown-brown
  40. 40.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 21000 Ω resistor? (a) brown-red-orange (b) red-brown-orange (c) red-brown-yellow (d) red-brown-red

Answer key

  1. 7900
  2. 610
  3. 5.1
  4. 0
  5. 870
  6. the one nearest an end
  7. 6
  8. 2100
  9. 74
  10. 4900
  11. 550
  12. green-violet-brown
  13. orange-red-red
  14. 3.6
  15. 5.3
  16. 7
  17. 1500
  18. 5 %
  19. 370
  20. grey-white-black
  21. 5
  22. 340
  23. 3.3
  24. 12
  25. 1.5
  26. 6.3
  27. red-green-brown
  28. 10000
  29. 9000
  30. red-orange-brown
  31. 18
  32. 180
  33. yellow-white-orange
  34. 37
  35. 82
  36. 25
  37. 76000
  38. 4
  39. brown-brown-brown
  40. red-brown-orange

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