Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 235 · 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 gold fourth band on a resistor means the value may be off by … (a) 0 % (b) 25 % (c) 50 % (d) 5 %
2. 2.🌈 Which band is read first on a resistor? (a) the widest gap (b) any band (c) the one nearest an end (d) the gold band
3. 3.🌈 A resistor has the colour bands green, grey, brown. What is its value (in ohms)?
4. 4.🌈 A resistor has the colour bands green, yellow, orange. What is its value (in ohms)?
5. 5.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 50 Ω resistor? (a) green-black-brown (b) blue-green-black (c) blue-black-black (d) green-black-black
6. 6.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 7000 Ω resistor? (a) grey-violet-red (b) violet-black-brown (c) violet-black-red (d) violet-black-orange
7. 7.🌈 A resistor has the colour bands blue, red, yellow. What is its value in kilo-ohms (kΩ)? =
8. 8.🌈 A resistor has the colour bands yellow, violet, orange. What is its value (in ohms)?
9. 9.🌈 In the resistor colour code, which number does black stand for?
10. 10.🌈 A resistor has the colour bands white, red, yellow. What is its value in kilo-ohms (kΩ)? =
11. 11.🌈 A resistor has the colour bands white, grey, orange. What is its value in kilo-ohms (kΩ)? =
12. 12.🌈 A resistor has the colour bands red, red, red. What is its value in kilo-ohms (kΩ)? =
13. 13.🌈 In the resistor colour code, which number does orange stand for?
14. 14.🌈 A resistor has the colour bands white, black, orange. What is its value in kilo-ohms (kΩ)? =
15. 15.🌈 A resistor has the colour bands white, white, orange. What is its value (in ohms)?
16. 16.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 9400 Ω resistor? (a) white-yellow-brown (b) white-yellow-red (c) yellow-white-red (d) white-yellow-orange
17. 17.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 78000 Ω resistor? (a) grey-violet-orange (b) violet-grey-orange (c) violet-grey-yellow (d) violet-grey-red
18. 18.🌈 In the resistor colour code, which number does green stand for?
19. 19.🌈 A resistor has the colour bands green, blue, yellow. What is its value in kilo-ohms (kΩ)? =
20. 20.🌈 In the resistor colour code, which number does grey stand for?
21. 21.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 94000 Ω resistor? (a) white-yellow-orange (b) white-yellow-red (c) yellow-white-orange (d) white-yellow-yellow
22. 22.🌈 A resistor has the colour bands green, brown, red. What is its value (in ohms)?
23. 23.🌈 A resistor has the colour bands red, green, brown. What is its value (in ohms)?
24. 24.🌈 A resistor has the colour bands orange, grey, yellow. What is its value in kilo-ohms (kΩ)? =
25. 25.🌈 A resistor has the colour bands green, grey, red. What is its value in kilo-ohms (kΩ)? =
26. 26.🌈 A resistor has the colour bands white, grey, red. What is its value (in ohms)?
27. 27.🌈 A resistor has the colour bands white, violet, black. What is its value (in ohms)?
28. 28.🌈 A resistor has the colour bands violet, brown, red. What is its value in kilo-ohms (kΩ)? =
29. 29.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 530 Ω resistor? (a) green-orange-black (b) green-orange-red (c) orange-green-brown (d) green-orange-brown
30. 30.🌈 A resistor has the colour bands orange, green, yellow. What is its value in kilo-ohms (kΩ)? =
31. 31.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 320 Ω resistor? (a) orange-red-black (b) orange-red-brown (c) orange-red-red (d) red-orange-brown
32. 32.🌈 In the resistor colour code, which number does red stand for?
33. 33.🌈 A resistor has the colour bands red, violet, yellow. What is its value in kilo-ohms (kΩ)? =
34. 34.🌈 In the resistor colour code, which number does white stand for?
35. 35.🌈 In the resistor colour code, which number does yellow stand for?
36. 36.🌈 A resistor has the colour bands red, black, brown. What is its value (in ohms)?
37. 37.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 940 Ω resistor? (a) yellow-white-brown (b) white-yellow-black (c) white-yellow-red (d) white-yellow-brown
38. 38.🌈 In the resistor colour code, which number does brown stand for?
39. 39.🌈 A resistor has the colour bands violet, white, brown. What is its value (in ohms)?
40. 40.🌈 A resistor has the colour bands violet, white, red. What is its value (in ohms)?

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