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Performance-Based Assessments for Basic Electricity Competencies
29 questions By Tony R. Kuphaldt
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Question 25 of 29
Reveal answerNote: be careful to choose a resistor with an adequate power rating (Watts)!
Notes:Use a variable-voltage, regulated power supply to supply any amount of DC voltage below 30 volts. For added challenge, set the power supply voltage high enough (at least 15 volts) that a 1/4 watt resistor will be inadequately rated for the power dissipation.
An extension of this exercise is to incorporate troubleshooting questions. Whether using this exercise as a performance assessment or simply as a concept-building lab, you might want to follow up your students’ results by asking them to predict the consequences of certain circuit faults.
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Question 26 of 29
Reveal answerUse circuit simulation software to verify schematic diagram. Your real circuit will verify the pictorial diagram.
Notes:Specify standard resistor values, all between 1 kΩ and 100 kΩ (1k5, 2k2, 2k7, 3k3, 4k7, 5k1, 6k8, 10k, 22k, 33k, 39k 47k, 68k, etc.).
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Question 27 of 29
Reveal answerUse circuit simulation software to verify your predicted and measured parameter values.
Notes:Use a variable-voltage, regulated power supply to supply any amount of DC voltage below 30 volts. Specify standard resistor values, all between 1 kΩ and 100 kΩ (1k5, 2k2, 2k7, 3k3, 4k7, 5k1, 6k8, 10k, 22k, 33k, 39k 47k, 68k, etc.).
An extension of this exercise is to incorporate troubleshooting questions. Whether using this exercise as a performance assessment or simply as a concept-building lab, you might want to follow up your students’ results by asking them to predict the consequences of certain circuit faults.
