Question 81Electricity/Electronics - 1st Asst/Chief70% to pass
To avoid misleading readings when testing the discrete semiconductor components of a printed circuit board when testing it with a volt-ohmmeter, what practice or practices should be avoided? I. Using resistance scales requiring high power II. Forward biasing of junctions or reversing polarity of the leads
AI Explanation
The correct answer is D) Neither I nor II.
The explanation is as follows:
1. Using resistance scales requiring high power and forward biasing of junctions or reversing polarity of the leads are not practices that should be avoided when testing the discrete semiconductor components of a printed circuit board with a volt-ohmmeter. These practices are actually recommended to obtain accurate readings and avoid misleading results.
2. Forward biasing the junctions helps to overcome the semiconductor's natural resistance, while reversing the polarity of the leads can help identify the type of semiconductor (diode, transistor, etc.). Additionally, using high-power resistance scales can provide more precise measurements compared to low-power scales.
3. Options A and B are incorrect because the practices mentioned in the question are not things that should be avoided, but rather recommended techniques for accurate testing of semiconductor components.
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