I had a question like this in a job interview The resistors

Assume r = 2
A = 2+2 = 4
B = 2/2+2 = 3
C = (2+2)/2 = 2
Higher resistance requires more power.

Probably getting trolled, oh well.

>>9129973
>-Arrange them from smallest resistance to biggest
C, A, B
>-Arrange them by power consumption if you connect them to a voltage source of the same potential
>implying this isn't the same as the previous
P=IR

>>9129988
Mixed up A and B

B, A, C for the fist one

C, A, B for the second

>>9129973
C A B

>>9129995
Woops, switch those

>>9129998
but shouldn't it be P = U*1, I is unkown and therefore I = U/R --> P = U^2/R

Therefore it will draw the most power with the smallest resistance because it will draw the biggest current from the source at that voltage.

I said in the interview that it should be the same sequence for both questions.

>>9129998
Ah, seems like we had the same reasoning anyway.
Smallest resistance causes a bigger power draw than a large resistance when connected to a voltage source?

>>9130009
For constant voltage, yes. Power varies inversely with resistance.

>>9130015
That's what I thought. They said in the interview that it would be the opposite, i.e. the higher the resistance the bigger the power consumption.
I said it was the other way around, i.e. higher power consumption as the resistance goes down.
I have to e-mail that guy(potential boss) and tell him his test was wrong.

>>9129989
I think P=I^2R actually

>>9130230
Your all missing the plot. P=I^2 * R, but for constant voltage I = V/R so P = V^2/R so power is inversely proportional to resistance (for constant voltage)..

>>9130236

>>9129989 here, I just read the OP wrong. I thought it just said connected to a power source, and assumed a constant current rather than voltage.
And P=IR was a typo

>>9129973
C<A<B

Don't you just add up all power of devices, so they all have the same power consumption

>>9129973
>>9130020
>I have to e-mail that guy(potential boss) and tell him his test was wrong.
Please don't embarrass yourself like that OP.

Total power = sum of power consumed by resistor

Power consumption does not change just because you put the resistors in parallel. This is basic shit

>>9131236
>Power consumption does not change just because you put the resistors in parallel
That isn't even slightly true. You shouldn't even be thinking of A, B, and C as having multiple resistors. Just treat them as a simplified, single resistor, then use P=V^2/R

>>9129973
this thread just made me realize just how fucking stupid /sci/ is. biochem grad student, if you've taken physics 2 you should be able to answer this shit like no problem, even with no scientific background. also what the fuck company uses this simple ass fucking question on a job interview

>>9131530
I'm hoping OP is a high schooler trying to pass an exam question off as a job interview question.