Recent content by FAS1998

That there is a phase angle of 60 - 180 = -120 degrees?

This is the entire question as written in my assignment. I’m not sure what else I can include.

I’m totally lost and struggling to understand my lecture notes. Can somebody point me in the right direction?

But dependent sources usually have equations like V = 5v1, where v1 is the voltage at some node present in the circuit. This equations shows a clear linear relationship between V and v1, but that isn't what determines the linearity of the component if I'm not mistaken. We need to know about the...

How would you determine the linearity of a theoretical dependent source from its corresponding equation? You wouldn't be able to take input/output measurements in this case.

How can we evaluate the linearity of a dependent voltage/current source? Components like resistors are easy to deal with because they always obey a linear equation. Dependent sources are more complicated because their voltage/current relationships depends on other parameters within the circuit.

I’m not sure. Is this related to modes of operation? Does this equation maybe only work in the active mode when Vc > Vb > Ve? Most of the material preceding the equation is about modes of operation.

No, I’m not quite sure what that means. I’m just beginning to learn how bjt transistors work and assumed that the textbook equation generally described how the collector current is related to the voltage between the base and emitter. Why is the equation not applicable in this context?

I’ve attached an image below of a section from my textbook and some circuit simulations. The textbook gives an equation for the collector current in a bjt transistor. The simulation shows two circuits (with the same bjt transistor) that have equal values for all variables present in the textbook...

Here’s the original question. It states that the circuit is a voltage divider, which I believe implies that the resistors are in series, and then the solution uses the equation for resistors in parallel to calculate the equivalent resistance. I’ve seen similar things elsewhere in the textbook...

I’ve included an image of a solution to a problem from my textbook. Part of the problem is to find the equivalent resistance of the given circuit. In the solution they seem to be treating the resistors as if they were in parallel. I don’t understand why they are doing this. For the two...

I’ve seen posts similar to this one, but I’m still struggling to understand this concept. Huygen’s principle is only valid with an odd number of spatial dimensions, yet it is often taught with the visual aid of 2 dimensional water waves. So why doesn’t Huygen’s principle apply in 2...

So would the symbol y in this context represent a different kind of thing than the variable x? Or can y be both a variable and a function of x?

I don’t quite understand what’s going on there. I understand that you’re taking the derivative of both sides of the equation, so the solution of the new equation will be the values of x where the derivatives are equal. But I don’t see how it makes sense to say that ##x=x^2 \Longrightarrow...

The solution to the second equation is x = 0 or x = 1. If you differentiate both sides you get ##1=2x## Which has the solution x = 1/2