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Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 771 · 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.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7100 Ω resistor? (a) brown-violet-red (b) violet-brown-red (c) violet-brown-brown (d) violet-brown-orange
  2. 2.🌈 A resistor has the colour bands yellow, red, black. What is its value (in ohms)?
  3. 3.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 640 Ω resistor? (a) blue-yellow-red (b) blue-yellow-brown (c) blue-yellow-black (d) yellow-blue-brown
  4. 4.🌈 A resistor has the colour bands green, yellow, red. What is its value (in ohms)?
  5. 5.🌈 In the resistor colour code, which number does brown stand for?
  6. 6.🌈 In the resistor colour code, which number does yellow stand for?
  7. 7.🌈 A gold fourth band on a resistor means the value may be off by … (a) 5 % (b) 25 % (c) 50 % (d) 0 %
  8. 8.🌈 A resistor has the colour bands red, blue, orange. What is its value (in ohms)?
  9. 9.🌈 A resistor has the colour bands orange, green, red. What is its value (in ohms)?
  10. 10.🌈 In the resistor colour code, which number does black stand for?
  11. 11.🌈 A resistor has the colour bands violet, violet, black. What is its value (in ohms)?
  12. 12.🌈 A resistor has the colour bands yellow, grey, yellow. What is its value in kilo-ohms (kΩ)? =
  13. 13.🌈 A resistor has the colour bands violet, violet, red. What is its value in kilo-ohms (kΩ)? =
  14. 14.🌈 Which band is read first on a resistor? (a) the one nearest an end (b) the widest gap (c) the gold band (d) any band
  15. 15.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 47000 Ω resistor? (a) yellow-violet-orange (b) violet-yellow-orange (c) yellow-violet-red (d) yellow-violet-yellow
  16. 16.🌈 A resistor has the colour bands green, brown, black. What is its value (in ohms)?
  17. 17.🌈 A resistor has the colour bands red, yellow, brown. What is its value (in ohms)?
  18. 18.🌈 A resistor has the colour bands orange, green, orange. What is its value in kilo-ohms (kΩ)? =
  19. 19.🌈 A resistor has the colour bands brown, orange, red. What is its value (in ohms)?
  20. 20.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 61 Ω resistor? (a) brown-blue-black (b) violet-brown-black (c) blue-brown-brown (d) blue-brown-black
  21. 21.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 30 Ω resistor? (a) yellow-orange-black (b) yellow-black-black (c) orange-black-brown (d) orange-black-black
  22. 22.🌈 A resistor has the colour bands grey, grey, black. What is its value (in ohms)?
  23. 23.🌈 In the resistor colour code, which number does white stand for?
  24. 24.🌈 A resistor has the colour bands yellow, green, yellow. What is its value in kilo-ohms (kΩ)? =
  25. 25.🌈 A resistor has the colour bands white, orange, orange. What is its value in kilo-ohms (kΩ)? =
  26. 26.🌈 A resistor has the colour bands grey, orange, brown. What is its value (in ohms)?
  27. 27.🌈 A resistor has the colour bands violet, grey, orange. What is its value (in ohms)?
  28. 28.🌈 A resistor has the colour bands orange, blue, orange. What is its value (in ohms)?
  29. 29.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 74000 Ω resistor? (a) violet-yellow-orange (b) yellow-violet-orange (c) violet-yellow-red (d) violet-yellow-yellow
  30. 30.🌈 A resistor has the colour bands grey, white, black. What is its value (in ohms)?
  31. 31.🌈 A resistor has the colour bands orange, yellow, black. What is its value (in ohms)?
  32. 32.🌈 A resistor has the colour bands red, grey, red. What is its value in kilo-ohms (kΩ)? =
  33. 33.🌈 A resistor has the colour bands red, blue, red. What is its value in kilo-ohms (kΩ)? =
  34. 34.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 580 Ω resistor? (a) green-grey-red (b) green-grey-brown (c) green-grey-black (d) grey-green-brown
  35. 35.🌈 A resistor has the colour bands brown, white, black. What is its value (in ohms)?
  36. 36.🌈 A resistor has the colour bands red, green, black. What is its value (in ohms)?
  37. 37.🌈 A resistor has the colour bands orange, yellow, red. What is its value in kilo-ohms (kΩ)? =
  38. 38.🌈 A resistor has the colour bands white, yellow, red. What is its value in kilo-ohms (kΩ)? =
  39. 39.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 51 Ω resistor? (a) blue-brown-black (b) green-brown-brown (c) brown-green-black (d) green-brown-black
  40. 40.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 34 Ω resistor? (a) orange-yellow-brown (b) orange-yellow-black (c) yellow-yellow-black (d) yellow-orange-black

Answer key

  1. violet-brown-red
  2. 42
  3. blue-yellow-brown
  4. 5400
  5. 1
  6. 4
  7. 5 %
  8. 26000
  9. 3500
  10. 0
  11. 77
  12. 480
  13. 7.7
  14. the one nearest an end
  15. yellow-violet-orange
  16. 51
  17. 240
  18. 35
  19. 1300
  20. blue-brown-black
  21. orange-black-black
  22. 88
  23. 9
  24. 450
  25. 93
  26. 830
  27. 78000
  28. 36000
  29. violet-yellow-orange
  30. 89
  31. 34
  32. 2.8
  33. 2.6
  34. green-grey-brown
  35. 19
  36. 25
  37. 3.4
  38. 9.4
  39. green-brown-black
  40. orange-yellow-black

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