Engineering Mutual Inductance between two conductors

AI Thread Summary
The discussion centers on calculating mutual inductance between two conductors, with the user expressing uncertainty about their results. They calculated the primary current (I1) as 0.01A and the induced voltage (Vi) as 12.566V, questioning if this value is too high. The user also derived the voltage across the second load (VL2) as 9.643V using Ohm's law and is unsure about their approach. For part (b), they plan to plot a linear relationship for Vi based on frequency and mutual inductance, while contemplating the effects of mutual inductance on current. Overall, the user seeks clarification on their calculations and methodology regarding mutual inductance.
Jason-Li
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Homework Statement
The mutual inductance between two circuits as shown is 0.2 μH.
It may be assumed that (R1 + RL1) >> ωL1 and that (R2 + RL2) >>ωL2.

(a) Estimate the crosstalk voltage at the load of circuit B when the signal
source of circuit A is V1 = 1 V at 1 GHz.

(b) Plot the crosstalk voltage (at the load of circuit B) as a function of
frequency.
Relevant Equations
(R1 + RL1) >> ωL1 and (R2 + RL2) >>ωL2.
1622463823984.png

Hello hope everyone at PF are keeping well!

Looking at this problem but don't know if I have oversimplified it and my final answer doesn't seem right?
So I drew the equivalent circuit:

1622462669994.png
1622462622905.png

Then went onto calculate:
I1 = 1/(R1+RL1) = 0.01A
ω = 2πf = 2π*109 rads-1
so then with Vi being the inducted voltage:
Vi = jω * M * I1 = 2π*109 * 0.2*10-6*0.01 = 12.566V This seems a bit high?

I also did the classic ohms law and did VL2 = Vi / (R2+RL2) * R2 = 9.643V to get the answer for (a)? I am really unsure if I have approached this correctly, any help would be greatly appreciated.

Then for part (b) I was just going to plot a straight line as the function is
Vi= jω*M*I1 I would change this to
Vi = (2π*M*I1)*f which is the same as y=mx ?
 

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I think the primary current is flowing through M, which has a large reactance. So I1 = V1/omega M (approx).
 
tech99 said:
I think the primary current is flowing through M, which has a large reactance. So I1 = V1/omega M (approx).

I think as it's mutual inductance current I1 won't be altered by M, but will effect M?

I have calculated I1 and then from that I can calculate the mutual inducted voltage?
 

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