Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 631 · 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.🌈 In the resistor colour code, which number does white stand for?
2. 2.🌈 In the resistor colour code, which number does blue stand for?
3. 3.🌈 Which band is read first on a resistor? (a) the gold band (b) any band (c) the widest gap (d) the one nearest an end
4. 4.🌈 A resistor has the colour bands brown, black, red. What is its value in kilo-ohms (kΩ)? =
5. 5.🌈 A resistor has the colour bands red, white, orange. What is its value in kilo-ohms (kΩ)? =
6. 6.🌈 A resistor has the colour bands red, brown, black. What is its value (in ohms)?
7. 7.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 4200 Ω resistor? (a) red-yellow-red (b) yellow-red-brown (c) yellow-red-orange (d) yellow-red-red
8. 8.🌈 In the resistor colour code, which number does black stand for?
9. 9.🌈 A gold fourth band on a resistor means the value may be off by … (a) 5 % (b) 0 % (c) 25 % (d) 50 %
10. 10.🌈 A resistor has the colour bands red, yellow, yellow. What is its value in kilo-ohms (kΩ)? =
11. 11.🌈 A resistor has the colour bands red, orange, red. What is its value in kilo-ohms (kΩ)? =
12. 12.🌈 A resistor has the colour bands grey, grey, orange. What is its value (in ohms)?
13. 13.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 16 Ω resistor? (a) brown-blue-brown (b) brown-blue-black (c) red-blue-black (d) blue-brown-black
14. 14.🌈 A resistor has the colour bands violet, violet, brown. What is its value (in ohms)?
15. 15.🌈 A resistor has the colour bands orange, brown, brown. What is its value (in ohms)?
16. 16.🌈 In the resistor colour code, which number does red stand for?
17. 17.🌈 A resistor has the colour bands grey, blue, black. What is its value (in ohms)?
18. 18.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 450 Ω resistor? (a) yellow-green-brown (b) yellow-green-red (c) yellow-green-black (d) green-yellow-brown
19. 19.🌈 A resistor has the colour bands red, red, brown. What is its value (in ohms)?
20. 20.🌈 A resistor has the colour bands blue, blue, brown. What is its value (in ohms)?
21. 21.🌈 A resistor has the colour bands yellow, red, orange. What is its value (in ohms)?
22. 22.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 45 Ω resistor? (a) yellow-green-brown (b) green-green-black (c) yellow-green-black (d) green-yellow-black
23. 23.🌈 A resistor has the colour bands grey, blue, orange. What is its value in kilo-ohms (kΩ)? =
24. 24.🌈 In the resistor colour code, which number does yellow stand for?
25. 25.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 610 Ω resistor? (a) brown-blue-brown (b) blue-brown-brown (c) blue-brown-black (d) blue-brown-red
26. 26.🌈 A resistor has the colour bands grey, yellow, brown. What is its value (in ohms)?
27. 27.🌈 A resistor has the colour bands orange, white, orange. What is its value (in ohms)?
28. 28.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 20000 Ω resistor? (a) red-black-yellow (b) orange-red-orange (c) red-black-orange (d) red-black-red
29. 29.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 98000 Ω resistor? (a) white-grey-yellow (b) grey-white-orange (c) white-grey-red (d) white-grey-orange
30. 30.🌈 A resistor has the colour bands orange, yellow, red. What is its value in kilo-ohms (kΩ)? =
31. 31.🌈 A resistor has the colour bands white, yellow, red. What is its value (in ohms)?
32. 32.🌈 A resistor has the colour bands brown, orange, black. What is its value (in ohms)?
33. 33.🌈 A resistor has the colour bands brown, blue, orange. What is its value (in ohms)?
34. 34.🌈 A resistor has the colour bands grey, red, orange. What is its value (in ohms)?
35. 35.🌈 A resistor has the colour bands brown, orange, brown. What is its value (in ohms)?
36. 36.🌈 A resistor has the colour bands yellow, white, brown. What is its value (in ohms)?
37. 37.🌈 A resistor has the colour bands orange, blue, orange. What is its value (in ohms)?
38. 38.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 2400 Ω resistor? (a) yellow-red-red (b) red-yellow-brown (c) red-yellow-orange (d) red-yellow-red
39. 39.🌈 In the resistor colour code, which number does orange stand for?
40. 40.🌈 A resistor has the colour bands green, white, black. What is its value (in ohms)?

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