Engineering Need help answering questions (Voltage source and 3 Resistors)

AI Thread Summary
The discussion revolves around solving circuit problems involving a voltage source and three resistors. The first question seeks to determine the voltage across resistor R1 when the current through resistor R is at its maximum, with an initial assumption that replacing the resistor with a wire would yield maximum current. The second question explores whether adjusting the resistance value can make the voltage across R1 equal to the voltage between points A and B (Vab). Participants suggest applying the voltage divider principle to relate V(R1) and Vab, emphasizing the need for a specific voltage divider ratio. The conversation highlights the importance of clear communication and accurate terminology in circuit analysis.
Purpleshinyrock
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Homework Statement
1-What is Voltage in R1 when current in R is maximum?

2-Is it possible to make voltage in R1 equal to vab through changing the value of R?
Relevant Equations
V=IR
Hello. I need help arriving to the answers to the following question above.
You will find the circuit attached
for Number 1 I though that crrent would be maximum when resistance is replaced with a wire but I couldn't get a an expression for ut.
as for question number 2 I tried applying node voltage to see If there's an equation to change the value of R so that what is desired happens but had no good results.
Can you help me?
YOUR TIME AND ATTENTION ARE DEEPLY APPRECIATED .
Thank You.
 

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Purpleshinyrock said:
Homework Statement:: 1-What is Voltage in R1 when current in R is maximum?

2-Is it possible to make voltage in R1 equal to vab through changing the value of R?
Relevant Equations:: V=IR

couldnt get a an expression for ut.
What is "ut"?

Purpleshinyrock said:
2-Is it possible to make voltage in R1 equal to vab through changing the value of R?
Relevant Equations:: V=IR

for question number 2 I tried applying node voltage to see If there's an equation to change the value of R so that what is desired happens but had no good results.
If V(R1) = V(AB), then you just have a 2:1 voltage divider overall, right? What has to happen to give you that voltage divider ratio?
 
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berkeman said:
What is "ut"?If V(R1) = V(AB), then you just have a 2:1 voltage divider overall, right? What has to happen to give you that voltage divider ratio?
Thank you for the reply. The only thing that stayed with me about voltage divider is the formula. Are You saying to apply it to V(r1) and make a relation to Vab and Vr1?
I meant ''Ir'' not ''ut'' it was a misstype appologies.
 

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