Max Collector Current in Transistor Circuits

AI Thread Summary
To calculate the maximum collector current (Ic_max) in transistor circuits, the source voltage is essential for determining the base current (Ib) using the equation Ic = BIb. The discussion highlights the need to consider saturation mode, where the collector-emitter voltage (Vce) is at its lowest, typically around 0.2V. A correction was made regarding the voltage drop, adjusting Vce to 8V, leading to the calculation of Ic_max as 9.8mA using the formula Ic_max = (10V - 0.2V) / 1000 ohms. The conversation emphasizes understanding the relationship between Vce and Ic in different operating modes. The final conclusion confirms the calculation of Ic_max was successfully resolved.
Marcin H
Messages
306
Reaction score
6

Homework Statement


Calculate the max collector current.

Homework Equations


Ic=BIb
V=IR

The Attempt at a Solution


I'm not sure how to find the max collector current. Don't I need the source voltage to find my Ib and then use that to find my Ic? Is there another way of finding Ic_max? Also, are B,C,D done correctly? I feel like D is wrong because of the huge voltage. (sorry about the bad scan. Had to use phone)
New Doc 12_1.jpg
 
Physics news on Phys.org
a. it says max POSSIBLE collector current. how high can Vce go?
b. & c. OK
d. can Ic exceed 10V/1K?
 
rude man said:
a. it says max POSSIBLE collector current. how high can Vce go?
b. & c. OK
d. can Ic exceed 10V/1K?
Just noticed the 2A error in my calculation for D. Should be 8V for Vce. And for A I'm not sure. I think the max possible collector current would happen in saturation mode. So does that mean Vce=Vce(sat)? So Vce would be 0.2V?
 
Marcin H said:
Just noticed the 2A error in my calculation for D. Should be 8V for Vce. And for A I'm not sure. I think the max possible collector current would happen in saturation mode. So does that mean Vce=Vce(sat)? So Vce would be 0.2V?
Icmax=(10V-0.2V)/1000ohms = 9.8mA. Never mind. Got it :)
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Question about circuits with transistors (current, voltage)
Replies
4
Views
2K
Max Input Signal: 0.3V for 1.5mA Collector Current
Replies
3
Views
2K
Calculating R with Beta in a Circuit
Replies
3
Views
2K
Current through an inductor as a function of time
Replies
10
Views
382
Solving Current & Power in 4 & 3 Wire Circuits
Replies
9
Views
2K
I don't understand transistors in combinations .... Or maybe basics ....
2
Replies
68
Views
6K
Designing a +10V Supply with Transistors: A Practical Approach
Replies
1
Views
1K
Calculation of current in driven series RLC circuit
Replies
8
Views
2K
How to Calculate Energy Stored in an Inductor?
Replies
16
Views
3K
Confirmation of T/F questions concerning Diodes-Transistors
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top