Homework Statement
A solar panel (an assemblage of solar cells) measures 58 cm x 53 cm. When facing the sun, this panel generates 2.7A at 14V. Sunlight delivers an energy of 1.0 x 10^3 W/m^2 to an area facing it. What is the efficiency of this panel, that is, what fraction of the energy in...
Thank you,
Yeah I'm looking over my notes now and I see that formula. I'm Glad I found this place, hopefully I can get my physics grade up a little higher. Thanks again for your input
Homework Statement
Two heating coils have resistances 12.0 ohms and 6.0 ohms, respectively.
a)What is the Joule heat generated in each if they are connected in parallel to a source of emf of 115V?
b) What if they are connected in series.Homework Equations
Am I doing this question properly? The...
I already answered the question. I had to look up resistivity for aluminum since the cable is made up of aluminum, and use the equation R=P(L/A). After finding the resistance. I was able to find out the power lost to Joule heating by using P=I^2(R). P=600^2(3.42)= 1.2X10^6W.
Homework Statement
The aluminum cable of a high-voltage transmission line carries a current 600A. The cable is 60km long, and it has a diameter of 2.5 cm. What is the power lost to Joule heating in this cable?
Homework Equations
Should I use the equation V=1/(4piEo)integral(dq/r) to...