In STEP 2, you should have observed that you could cause D1 to light by simply touching the base lead of the transistor, or a wire connected to that lead. Which answer below best explains why this happened? O The floating base was pulled down by the addition of 100KQ of resistance at R3, preventing the accidental triggering of the transistor. O The 10KQ resistor at R1 is powerful enough to drive a current through the transistor base just from the base lead being touched. O The LED in my circuit did not light when I touched the transistor base, even though the circuit was built correctly. I did not follow instructions to ask for additional help resolving the problem. O The base/emitter connection of the transistor is very sensitive. Even a slight difference in potential across that connection can trigger the transistor. When the base is "floating" that difference can easily come from a person touching the lead.
In STEP 2, you should have observed that you could cause D1 to light by simply touching the base lead of the transistor, or a wire connected to that lead. Which answer below best explains why this happened? O The floating base was pulled down by the addition of 100KQ of resistance at R3, preventing the accidental triggering of the transistor. O The 10KQ resistor at R1 is powerful enough to drive a current through the transistor base just from the base lead being touched. O The LED in my circuit did not light when I touched the transistor base, even though the circuit was built correctly. I did not follow instructions to ask for additional help resolving the problem. O The base/emitter connection of the transistor is very sensitive. Even a slight difference in potential across that connection can trigger the transistor. When the base is "floating" that difference can easily come from a person touching the lead.
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 22RQ
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Question
STEP 2: The slight difference in potential between you and the breadboard is enough to trigger the transistor and allow current to flow from the Collector to the Emitter.
Transcribed Image Text:R1
R2
10 kQ
1 kQ
D1
PSB
Green
5 V
SW1
Q1
!YOU
2N2222
Transcribed Image Text:In STEP 2, you should have observed that you could cause D1 to light by simply touching the base lead of the
transistor, or a wire connected to that lead. Which answer below best explains why this happened?
O The floating base was pulled down by the addition of 10O0KQ of resistance at R3, preventing the accidental triggering of the transistor.
O The 10kQ resistor at R1 is powerful enough to drive a current through the transistor base just from the base lead being touched.
O The LED in my circuit did not light when I touched the transistor base, even though the circuit was built correctly. I did not follow instructions to ask
for additional help resolving the problem.
O The base/emitter connection of the transistor is very sensitive. Even a slight difference in potential across that connection can trigger the transistor.
When the base is "floating" that difference can easily come from a person touching the lead.
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