Çözüldü Ohm's Law - Maximum Power Delivery - Differentiation - Negative Electrical Power

https://i.ibb.co/TLVC5yQ/Power.png
https://cdn5-ss9.sharpschool.com/UserFiles/Servers/Server_587103/File/18-19 Summer Practice SAT.pdf
[Page 643 (17 in the pdf file), Question 32]

I = 120 volts / 12 ohms = 10 amperes
dP / dI = P'(I) = -24I + 120
P'(10) = -24·10 + 120 = -120 watts.

Reference:
"In electrical engineering, power represents the rate of electrical energy flowing into or out of a given device (electrical component) or control volume. Power is a signed quantity; negative power represents power flowing in the opposite direction from positive power."
https://en.wikipedia.org/wiki/Passive_sign_convention

Note: "Negative power simply means that the circuit is delivering power."
https://electronics.stackexchange.c...ransfer-be-negative-in-a-power-delivery-circu