(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A section of a circuit XY shown below absorbs 50 W of power when a current I = 1.0 A passes through it as indicated by the arrow labeled i.

(a) What is the voltage difference between X and Y?

(b) What is the voltage difference across element C?

2. Relevant equations

V = IR

P = (V^{2})/R

P = (I^{2})R

3. The attempt at a solution

I have answers for both parts, but I'm not confident about them.

(a) P = V^{2}/R

R = V/I

P = V^{2}/(V/I) = IV

V_{x}= P/I = (50 W) (1.0 A) = 50 V

P = I^{2}R

I =[itex]\sqrt{P/R}[/itex]

V_{y}= IR = [itex]\sqrt{P/R}[/itex]*R = [itex]\sqrt{(50 W)/(2 Ω)}[/itex]*(2 Ω)

= 20V

V_{x}- V_{y}= 50 V - 20 V = 30 V

(b) Wouldn't it be 0? Why would the voltage change across the capacitor?

Edit: Maybe it's not a capacitor and I'm confused?

Thanks!

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# Homework Help: Find the difference in voltage at different points in a circuit.

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