which of the following statements is a true statement concerning the T-N theorem? #1-the T-N theorem can be applied only to d-c circuit analysis. #2-the T-n theorem can be applied only to a-c circuit analysis #3-the T-N theorem can be applied to circuits containing both d-c and a-c sources

#4-the T-N theorem can be applied to both d-c and a-c circuit analysis as long as the circuit contains either all d-c or all a-c sources

Well, I Googled T-N theorem and can find no mention of anything with that name, except for your question.

Does it have anything to do with Thevenin's and Norton's theorems?

yes

In that case, #3.

Here we examine noise in a digital channel between an AND gate and an inverter shown in Figure 16. The channel has a length of D=30m and noise is added in at the rate of 0.6Vm.

To correct for that noise, we introduce non-inverting buffers into the channel. The purpose of a buffer is to take an input and replicate it at the buffer's output. This buffer is useful because it clean up a signal which no longer meets the ouptut specification of the static discipline due to noise, so that it once again meets the output specifications of the static discipline.

These buffers, as well as the gates shown, obey the following static discipline: VOL=0.7V,VIL=2.0V,VIH=3.0V,VOH=4.3V. What is the minimum number of buffers required to connect between the digital links in order to ensure correct operation?

Now let's consider the NOR gate in Figure 18 which has VS=5V and the following given static discipline: VOL=0.9V,VIL=2.4V,VIH=3.5V,VOH=4V.

Assume that both MOSFETs have the same VT and RON=20kÙ.

What is the minimum value of VT in Volts that allows the NOR gate to satisfy the given static discipline? (This is 2.4)

What is the maximum value of VT in Volts that allows the NOR gate to satisfy the given static discipline? (This is 3.5)

What is the minimum value of RL (in kÙ) that allows the NOR gate to satisfy the given static discipline? ?????

To determine which of the statements is true concerning the T-N theorem, we need to understand what the T-N theorem is and how it can be applied.

The Tellegen's theorem (often referred to as T-N theorem) is a fundamental theorem in electrical circuit analysis. It states that the sum of instantaneous powers in any branch of a network is always zero. In other words, the sum of power being generated and consumed at any instant in a circuit is always balanced.

Now, let's evaluate each statement to see which one is true:

Statement #1: "The T-N theorem can be applied only to d-c circuit analysis."
This statement is incorrect. The T-N theorem can be applied to both d-c (direct current) and a-c (alternating current) circuit analysis.

Statement #2: "The T-N theorem can be applied only to a-c circuit analysis."
This statement is also incorrect. The T-N theorem is not limited to a-c circuit analysis alone and can be applied to both d-c and a-c circuits.

Statement #3: "The T-N theorem can be applied to circuits containing both d-c and a-c sources."
This statement is true. The T-N theorem can indeed be applied to circuits containing both d-c and a-c sources. It is a general theorem that holds true for any combination of electrical sources.

Statement #4: "The T-N theorem can be applied to both d-c and a-c circuit analysis as long as the circuit contains either all d-c or all a-c sources."
This statement is also true. While the T-N theorem can be applied to circuits containing both d-c and a-c sources, it is essential to note that it can be applied even if the circuit contains either all d-c or all a-c sources.

So, the correct statement is Statement #4: "The T-N theorem can be applied to both d-c and a-c circuit analysis as long as the circuit contains either all d-c or all a-c sources."