Electronics Worksheet: Resistor Colour Code

Electronics lesson 15: Resistor colour code · Set 900 · 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 brown, yellow, black. What is its value (in ohms)?
2. 2.🌈 A resistor has the colour bands blue, white, red. What is its value (in ohms)?
3. 3.🌈 A gold fourth band on a resistor means the value may be off by … (a) 0 % (b) 5 % (c) 50 % (d) 25 %
4. 4.🌈 A resistor has the colour bands blue, brown, red. What is its value in kilo-ohms (kΩ)? =
5. 5.🌈 A resistor has the colour bands violet, yellow, brown. What is its value (in ohms)?
6. 6.🌈 In the resistor colour code, which number does black stand for?
7. 7.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark an 86 Ω resistor? (a) grey-blue-brown (b) blue-grey-black (c) white-blue-black (d) grey-blue-black
8. 8.🌈 A resistor has the colour bands grey, blue, orange. What is its value (in ohms)?
9. 9.🌈 A resistor has the colour bands grey, white, brown. What is its value (in ohms)?
10. 10.🌈 A resistor has the colour bands red, red, orange. What is its value in kilo-ohms (kΩ)? =
11. 11.🌈 A resistor has the colour bands green, grey, orange. What is its value (in ohms)?
12. 12.🌈 In the resistor colour code, which number does orange stand for?
13. 13.🌈 A resistor has the colour bands red, black, black. What is its value (in ohms)?
14. 14.🌈 In the resistor colour code, which number does violet stand for?
15. 15.🌈 In the resistor colour code, which number does grey stand for?
16. 16.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 65 Ω resistor? (a) blue-green-black (b) blue-green-brown (c) violet-green-black (d) green-blue-black
17. 17.🌈 A resistor has the colour bands brown, green, brown. What is its value (in ohms)?
18. 18.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 68 Ω resistor? (a) grey-blue-black (b) blue-grey-black (c) violet-grey-black (d) blue-grey-brown
19. 19.🌈 A resistor has the colour bands blue, red, orange. What is its value in kilo-ohms (kΩ)? =
20. 20.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 910 Ω resistor? (a) white-brown-black (b) white-brown-brown (c) brown-white-brown (d) white-brown-red
21. 21.🌈 A resistor has the colour bands white, orange, brown. What is its value (in ohms)?
22. 22.🌈 A resistor has the colour bands green, green, red. What is its value in kilo-ohms (kΩ)? =
23. 23.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 240 Ω resistor? (a) red-yellow-black (b) yellow-red-brown (c) red-yellow-brown (d) red-yellow-red
24. 24.🌈 A resistor has the colour bands blue, white, yellow. What is its value in kilo-ohms (kΩ)? =
25. 25.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 72 Ω resistor? (a) red-violet-black (b) violet-red-black (c) violet-red-brown (d) grey-red-black
26. 26.🌈 A resistor has the colour bands yellow, white, red. What is its value (in ohms)?
27. 27.🌈 A resistor has the colour bands yellow, black, black. What is its value (in ohms)?
28. 28.🌈 A resistor has the colour bands orange, black, brown. What is its value (in ohms)?
29. 29.🌈 A resistor has the colour bands brown, brown, red. What is its value in kilo-ohms (kΩ)? =
30. 30.🌈 A resistor has the colour bands brown, orange, yellow. What is its value in kilo-ohms (kΩ)? =
31. 31.🌈 A resistor has the colour bands yellow, blue, red. What is its value in kilo-ohms (kΩ)? =
32. 32.🌈 A resistor has the colour bands violet, grey, red. What is its value (in ohms)?
33. 33.🌈 A resistor has the colour bands blue, white, red. What is its value in kilo-ohms (kΩ)? =
34. 34.🌈 In the resistor colour code, which number does yellow stand for?
35. 35.🌈 A resistor has the colour bands yellow, blue, red. What is its value (in ohms)?
36. 36.🌈 Which band is read first on a resistor? (a) the one nearest an end (b) the widest gap (c) any band (d) the gold band
37. 37.🌈 Which colour bands (1st digit, 2nd digit, multiplier) mark a 4300 Ω resistor? (a) yellow-orange-orange (b) orange-yellow-red (c) yellow-orange-red (d) yellow-orange-brown
38. 38.🌈 In the resistor colour code, which number does brown stand for?
39. 39.🌈 A resistor has the colour bands violet, green, red. What is its value (in ohms)?
40. 40.🌈 A resistor has the colour bands grey, white, red. What is its value (in ohms)?

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