Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 139 · 40 questions

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.

1. 1.🌈 A resistor has the colour bands red, brown, yellow. What is its value in kilo-ohms (kΩ)? =
2. 2.🌈 A resistor has the colour bands violet, white, black. What is its value (in ohms)?
3. 3.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 87000 Ω resistor? (a) grey-violet-yellow (b) grey-violet-orange (c) grey-violet-red (d) violet-grey-orange
4. 4.🌈 A gold fourth band on a resistor means the value may be off by … (a) 50 % (b) 25 % (c) 5 % (d) 0 %
5. 5.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 90 Ω resistor? (a) brown-black-black (b) brown-white-black (c) white-black-brown (d) white-black-black
6. 6.🌈 In the resistor colour code, which number does green stand for?
7. 7.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 90000 Ω resistor? (a) white-black-red (b) white-black-orange (c) white-black-yellow (d) brown-white-orange
8. 8.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 610 Ω resistor? (a) blue-brown-black (b) blue-brown-brown (c) brown-blue-brown (d) blue-brown-red
9. 9.🌈 A resistor has the colour bands grey, violet, orange. What is its value in kilo-ohms (kΩ)? =
10. 10.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 31 Ω resistor? (a) orange-brown-brown (b) brown-orange-black (c) yellow-brown-black (d) orange-brown-black
11. 11.🌈 Which band is read first on a resistor? (a) any band (b) the widest gap (c) the one nearest an end (d) the gold band
12. 12.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 72 Ω resistor? (a) grey-red-black (b) red-violet-black (c) violet-red-black (d) violet-red-brown
13. 13.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 920 Ω resistor? (a) white-red-red (b) white-red-brown (c) white-red-black (d) red-white-brown
14. 14.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 250 Ω resistor? (a) red-green-black (b) red-green-red (c) green-red-brown (d) red-green-brown
15. 15.🌈 A resistor has the colour bands blue, white, orange. What is its value (in ohms)?
16. 16.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 70 Ω resistor? (a) violet-black-black (b) grey-violet-black (c) violet-black-brown (d) grey-black-black
17. 17.🌈 A resistor has the colour bands yellow, violet, black. What is its value (in ohms)?
18. 18.🌈 A resistor has the colour bands violet, green, yellow. What is its value in kilo-ohms (kΩ)? =
19. 19.🌈 A resistor has the colour bands yellow, white, orange. What is its value in kilo-ohms (kΩ)? =
20. 20.🌈 A resistor has the colour bands yellow, grey, yellow. What is its value in kilo-ohms (kΩ)? =
21. 21.🌈 In the resistor colour code, which number does yellow stand for?
22. 22.🌈 In the resistor colour code, which number does brown stand for?
23. 23.🌈 A resistor has the colour bands violet, yellow, brown. What is its value (in ohms)?
24. 24.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 710 Ω resistor? (a) violet-brown-red (b) violet-brown-brown (c) brown-violet-brown (d) violet-brown-black
25. 25.🌈 In the resistor colour code, which number does red stand for?
26. 26.🌈 A resistor has the colour bands green, green, orange. What is its value (in ohms)?
27. 27.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 95000 Ω resistor? (a) green-white-orange (b) white-green-red (c) white-green-yellow (d) white-green-orange
28. 28.🌈 In the resistor colour code, which number does white stand for?
29. 29.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 79 Ω resistor? (a) grey-white-black (b) violet-white-brown (c) violet-white-black (d) white-violet-black
30. 30.🌈 In the resistor colour code, which number does violet stand for?
31. 31.🌈 A resistor has the colour bands violet, violet, orange. What is its value in kilo-ohms (kΩ)? =
32. 32.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 740 Ω resistor? (a) violet-yellow-black (b) yellow-violet-brown (c) violet-yellow-brown (d) violet-yellow-red
33. 33.🌈 A resistor has the colour bands violet, violet, yellow. What is its value in kilo-ohms (kΩ)? =
34. 34.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 81 Ω resistor? (a) grey-brown-brown (b) brown-grey-black (c) white-brown-black (d) grey-brown-black
35. 35.🌈 A resistor has the colour bands orange, violet, black. What is its value (in ohms)?
36. 36.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 38000 Ω resistor? (a) orange-grey-red (b) orange-grey-yellow (c) orange-grey-orange (d) grey-orange-orange
37. 37.🌈 In the resistor colour code, which number does blue stand for?
38. 38.🌈 A resistor has the colour bands orange, grey, black. What is its value (in ohms)?
39. 39.🌈 A resistor has the colour bands violet, orange, yellow. What is its value in kilo-ohms (kΩ)? =
40. 40.🌈 A resistor has the colour bands grey, red, orange. What is its value (in ohms)?

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