please question 6 We propose to study the assembly of figure 1which allows the ignition of a red diode from acertain percentage of humidity in the air detectedby a sensor. The assembly elements are:VDD=3V, R₁=1kn2, R₂=1000, R3=27002. Diode D₁:VSD1 1.2V, RSD1=12 2. Transistor T₁: B=100,VCEsat 0.2V and its base VST1=0.6V, RST1=1kQ2. Thevalue of the resistor RH depend on the airhumidity's percentage (noted X) following therelation RH=30X; where RH is in 2 and X in %. Inall numerical applications, we will suppose thatB+1 B. VDD is referenced to ground.1. Determine the expressions of the elements of theequivalent Thevenin generator (indicated on thefigure) according to VDD, R₁, R₂ and RH.2. Taking into account the operation of the transistor, give the expression of the current flowingthrough the resistor R3 as a function of IB1.3. Give the expression of the voltage VE1 as a function of IB1. Deduce the expression of VCE14. Give the expression of the current IB1 as a function of Eth, Rth B, VSTI, RST1 VDS1, RSD1 and R3.We are now looking for the percentage of humidity that unlocks the transistor.5. Among the following 4 propositions, which one is correct?a. If D₁is blocked then T, is saturatedb. If T₁ is passing then D₁ is saturatedc. D₁ becomes passing only if T₁ becomes passingd. T₁ becomes saturated only if D₁ becomes passingR₁RHR₂Capteurd'humidité↓VBEIThevenin ICIIBILEDrougeVDDRD₁T₁Figure1:mmVCELM6. In this case, what will be the particular value of Eth? What is the particular value of RH?PAFTORGNYVEI

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Answered: 6. In this case, what will be the…

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6. In this case, what will be the particular value of Eth? What is the particular value of RH? 7 Dotermin th

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

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Question

please question 6

We propose to study the assembly of figure 1
which allows the ignition of a red diode from a
certain percentage of humidity in the air detected
by a sensor. The assembly elements are:
VDD=3V, R₁=1kn2, R₂=1000, R3=27002. Diode D₁:
VSD1 1.2V, RSD1=12 2. Transistor T₁: B=100,
VCEsat 0.2V and its base VST1=0.6V, RST1=1kQ2. The
value of the resistor RH depend on the air
humidity's percentage (noted X) following the
relation RH=30X; where RH is in 2 and X in %. In
all numerical applications, we will suppose that
B+1 B. VDD is referenced to ground.
1. Determine the expressions of the elements of the
equivalent Thevenin generator (indicated on the
figure) according to VDD, R₁, R₂ and RH.
2. Taking into account the operation of the transistor, give the expression of the current flowing
through the resistor R3 as a function of IB1.
3. Give the expression of the voltage VE1 as a function of IB1. Deduce the expression of VCE1
4. Give the expression of the current IB1 as a function of Eth, Rth B, VSTI, RST1 VDS1, RSD1 and R3.
We are now looking for the percentage of humidity that unlocks the transistor.
5. Among the following 4 propositions, which one is correct?
a. If D₁is blocked then T, is saturated
b. If T₁ is passing then D₁ is saturated
c. D₁ becomes passing only if T₁ becomes passing
d. T₁ becomes saturated only if D₁ becomes passing
R₁
RH
R₂
Capteur
d'humidité
↓
VBEI
Thevenin ICI
IBI
LED
rouge
VDD
R
D₁
T₁
Figure1:
mm
VCEL
M
6. In this case, what will be the particular value of Eth? What is the particular value of RH?
PAFTORGNY
VEI

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