Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 850 · 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.🌈 Which band is read first on a resistor? (a) the one nearest an end (b) any band (c) the gold band (d) the widest gap
2. 2.🌈 In the resistor colour code, which number does violet stand for?
3. 3.🌈 A resistor has the colour bands orange, green, brown. What is its value (in ohms)?
4. 4.🌈 A resistor has the colour bands brown, green, red. What is its value (in ohms)?
5. 5.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 20 Ω resistor? (a) orange-red-black (b) red-black-brown (c) orange-black-black (d) red-black-black
6. 6.🌈 A resistor has the colour bands white, orange, red. What is its value (in ohms)?
7. 7.🌈 A resistor has the colour bands white, red, brown. What is its value (in ohms)?
8. 8.🌈 A resistor has the colour bands yellow, black, red. What is its value in kilo-ohms (kΩ)? =
9. 9.🌈 A resistor has the colour bands grey, black, orange. What is its value (in ohms)?
10. 10.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 470 Ω resistor? (a) yellow-violet-black (b) yellow-violet-red (c) yellow-violet-brown (d) violet-yellow-brown
11. 11.🌈 A gold fourth band on a resistor means the value may be off by … (a) 25 % (b) 0 % (c) 50 % (d) 5 %
12. 12.🌈 A resistor has the colour bands red, brown, brown. What is its value (in ohms)?
13. 13.🌈 A resistor has the colour bands orange, white, red. What is its value (in ohms)?
14. 14.🌈 A resistor has the colour bands red, black, red. What is its value in kilo-ohms (kΩ)? =
15. 15.🌈 A resistor has the colour bands grey, blue, red. What is its value (in ohms)?
16. 16.🌈 A resistor has the colour bands violet, black, red. What is its value (in ohms)?
17. 17.🌈 A resistor has the colour bands red, brown, black. What is its value (in ohms)?
18. 18.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7400 Ω resistor? (a) yellow-violet-red (b) violet-yellow-brown (c) violet-yellow-red (d) violet-yellow-orange
19. 19.🌈 A resistor has the colour bands red, grey, orange. What is its value (in ohms)?
20. 20.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 86000 Ω resistor? (a) blue-grey-orange (b) grey-blue-orange (c) grey-blue-yellow (d) grey-blue-red
21. 21.🌈 A resistor has the colour bands brown, blue, red. What is its value in kilo-ohms (kΩ)? =
22. 22.🌈 A resistor has the colour bands orange, brown, orange. What is its value (in ohms)?
23. 23.🌈 A resistor has the colour bands blue, blue, black. What is its value (in ohms)?
24. 24.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 9200 Ω resistor? (a) white-red-red (b) white-red-brown (c) red-white-red (d) white-red-orange
25. 25.🌈 A resistor has the colour bands brown, red, orange. What is its value in kilo-ohms (kΩ)? =
26. 26.🌈 In the resistor colour code, which number does green stand for?
27. 27.🌈 In the resistor colour code, which number does grey stand for?
28. 28.🌈 A resistor has the colour bands yellow, brown, red. What is its value in kilo-ohms (kΩ)? =
29. 29.🌈 A resistor has the colour bands red, red, red. What is its value in kilo-ohms (kΩ)? =
30. 30.🌈 In the resistor colour code, which number does black stand for?
31. 31.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 77000 Ω resistor? (a) violet-grey-orange (b) violet-violet-yellow (c) violet-violet-red (d) violet-violet-orange
32. 32.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 500 Ω resistor? (a) green-black-brown (b) green-black-red (c) blue-green-brown (d) green-black-black
33. 33.🌈 A resistor has the colour bands red, orange, brown. What is its value (in ohms)?
34. 34.🌈 A resistor has the colour bands red, violet, brown. What is its value (in ohms)?
35. 35.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 23 Ω resistor? (a) orange-red-black (b) red-orange-black (c) red-orange-brown (d) orange-orange-black
36. 36.🌈 A resistor has the colour bands white, white, orange. What is its value (in ohms)?
37. 37.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 640 Ω resistor? (a) blue-yellow-red (b) yellow-blue-brown (c) blue-yellow-black (d) blue-yellow-brown
38. 38.🌈 In the resistor colour code, which number does orange stand for?
39. 39.🌈 A resistor has the colour bands brown, red, red. What is its value in kilo-ohms (kΩ)? =
40. 40.🌈 In the resistor colour code, which number does yellow stand for?

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