Hello.
I am unable to solve this problem. They're asking for R so that maximum power is transfered to RL.
I understood this as: RL is Rthevenin for maximum power to be delivered, so in this case, if R = 10 ohms, Rthevenin becomes equal to 15 ohms and the problem is solved.
But their answer is R infinite. First I thought it was their mistake, but to confirm I took several values of R (10, 100) and I remarked that the power is increasing as we increase R. I understand why: it is because less current is passing as we increase R, so more current will pass in the other branch, thus more power.
I need to know if there is a rule on this. Being on an exam, my first guess would be 10ohms. I'd like to know why I was wrong.
Thank you
I am unable to solve this problem. They're asking for R so that maximum power is transfered to RL.
I understood this as: RL is Rthevenin for maximum power to be delivered, so in this case, if R = 10 ohms, Rthevenin becomes equal to 15 ohms and the problem is solved.
But their answer is R infinite. First I thought it was their mistake, but to confirm I took several values of R (10, 100) and I remarked that the power is increasing as we increase R. I understand why: it is because less current is passing as we increase R, so more current will pass in the other branch, thus more power.
I need to know if there is a rule on this. Being on an exam, my first guess would be 10ohms. I'd like to know why I was wrong.
Thank you
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