Nifty seeing how people see "VA" as different things. In my case, I think I "see" that you mean the Early effect model parameter, V?. If so,

The equation is:

1. ? ? ?Ic = Is ? e^(Vbe ? Vt) ? (1+Vce ? V?)

But if Vbe is constant, then:

2. ? ? ?Ic = ?Ic ? (1+Vce ? V?), where ?Ic = Is ? e^(Vbe ? Vt)

(You should know that Vt = k?T ? q)

If you define:

3. ? ? ?r? = V? ? ?Ic

then,

4. ? ? ?Ic = ?Ic + Vce ? r?

Active region, of course.

But that's just my first impression of the question, as written.

Formula is



VA / VCE = A (amperes)



IC = A.





Here I assume VA is the watts of power used and Vce is the collector potential. Ic is the collector current.

First you need to check whether the BJT is in active region or saturation region.





If it is in active region, then Ic = BIb, where B is the current gain.



If it is in the saturation region, then it is a problem on simple network analysis. For this we need the circuit diagram with all the component values listed. The formula for calculating it will be based on its configuration.

What does VA represent? If it is the supply voltage and you know VCE, then IC=(Va-Vce)/Rc if there is no emitter resistor. You really need to show a schematic to get meaningful help.

i have is question on BJT transistor i need a help on and it is how to calculate IC if the question only gives me VA and VCE and consider that VBE is constant?





i wana know which formula we use to solve it





thanks