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Resistors
11 questions By Tony R. Kuphaldt
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Question 10 of 11
Determine whether or not the following resistors measure within the resistance range specified by their color codes:
- • (Org, Org, Red, Blk, Blu) Measured resistance = 332.5 Ω
- • (Brn, Blk, Blk, Gld, Red) Measured resistance = 9.7 Ω
- • (Blu, Vio, Brn, Red, Grn) Measured resistance = 67.43 kΩ
- • (Red, Wht, Grn, Yel, Vio) Measured resistance = 2.949 MΩ
- • (Yel, Vio, Org, Gld) Measured resistance = 44.68 kΩ
- • (Gry, Red, Brn, Sil) Measured resistance = 905 Ω
- • (Grn, Blu, Gld) Measured resistance = 6.73 Ω
- • (Vio, Brn, Red, Gld, Brn) Measured resistance = 70.82 Ω
- • (Wht, Org, Blu, Brn, Grn) Measured resistance = 9.38 kΩ
- • (Red, Blk, Wht, Grn, Vio) Measured resistance = 20.86 MΩ
Assume that all five-band resistors listed here use the precision color code as opposed to the military 5-band code where the fifth band indicates resistor reliability.
Reveal answer- • (Org, Org, Red, Blk, Blu) Measured resistance = 332.5 Ω Within tolerance
- • (Brn, Blk, Blk, Gld, Red) Measured resistance = 9.7 Ω Out of tolerance!
- • (Blu, Vio, Brn, Red, Grn) Measured resistance = 67.43 kΩ Within tolerance
- • (Red, Wht, Grn, Yel, Vio) Measured resistance = 2.949 MΩ Within tolerance
- • (Yel, Vio, Org, Gld) Measured resistance = 44.68 kΩ Within tolerance
- • (Gry, Red, Brn, Sil) Measured resistance = 905 Ω Out of tolerance!
- • (Grn, Blu, Gld) Measured resistance = 6.73 Ω Out of tolerance!
- • (Vio, Brn, Red, Gld, Brn) Measured resistance = 70.82 Ω Within tolerance
- • (Wht, Org, Blu, Brn, Grn) Measured resistance = 9.38 kΩ Within tolerance
- • (Red, Blk, Wht, Grn, Vio) Measured resistance = 20.86 MΩ Out of tolerance!
Notes:This question serves as a great review for the mathematical concepts of scientific notation and percentages. They will have to calculate the allowable range of resistance values for each resistor in order to determine whether or not the measured value falls within that range.
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Question 11 of 11
Find one or two real resistors and bring them with you to class for discussion. Identify as much information as you can about your resistors prior to discussion:
- • Resistance (ideal)
- • Resistance (actual)
- • Power rating
- • Type (carbon composition, metal film, wire-wound, etc.)
Reveal answerIf possible, find a manufacturer’s datasheet for your components (or at least a datasheet for a similar component) to discuss with your classmates.
Be prepared to prove the actual resistance of your resistors in class, by using a multimeter!
Notes:The purpose of this question is to get students to kinesthetically interact with the subject matter. It may seem silly to have students engage in a “show and tell” exercise, but I have found that activities such as this greatly help some students. For those learners who are kinesthetic in nature, it is a great help to actually touch real components while they’re learning about their function. Of course, this question also provides an excellent opportunity for them to practice interpreting color codes and/or component markings, use a multimeter, access datasheets, etc.
Awesome! job!!!
Informative 😊
https://forum.allaboutcircuits.com/threads/resistor-worksheet-question-8-insufficient-resources.199603/post-1894332
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