Max Power of Resistor in 3-Resistor Circuit

AI Thread Summary
In a circuit with three 100-ohm resistors, the maximum power delivered to any single resistor is 28.0 W. The user initially calculated the total resistance but struggled to determine the current needed for voltage calculations. They realized that the maximum current flows through the left resistor, allowing them to apply Ohm's law to find the voltage. After further discussion, the user clarified their goal was to find the maximum voltage across each resistor. Ultimately, they successfully found the answer they were looking for.
complexc25
Messages
12
Reaction score
0

Homework Statement


Three 100 resistors are connected as shown in the figure. The maximum power that can safely be delivered to anyone resistor is 28.0 W.
"[URL=[PLAIN]http://imageshack.us[/URL]

Homework Equations


P = VI

The Attempt at a Solution


I found the total resistance of the circuit, but i don't know how to get the current, which i need for the voltage
 
Last edited by a moderator:
Physics news on Phys.org
The maximum current flows through the resistor on the left. So, if you calculate that current (from the power), you can get the voltage by using Ohm's law.

I'm not sure if this is correct.
 
Could you be a little more clear about what you want to solve? For example do you want voltage across any particular resistor or voltage between A and B?
P=V^2/R
 
never mind ...i found the answer. What i wanted was the maximum voltage to each resistor.
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Trying to understand the logic behind adding vectors with an angle between them'
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
Back
Top