a E1 ER E2 be A The figure shows an electric circuit where the box A is a black box (.e, it contains certain devices in them, but either you don't know or you don't care what it contains). The two emf devices give energy to the circuit with powers P and P2, while the black box uses energy with power PA. Data: I = 0.2 A, P1 = 11 W, P2 = 37 W, PA = 40 W. (a) What is the potential drop Vah on the resistor? Vab (b) What i the resistance R of the resistor? R Ω %3D

a E1 ER E2 be A The figure shows an electric circuit where the box A is a black box (.e, it contains certain devices in them, but either you don't know or you don't care what it contains). The two emf devices give energy to the circuit with powers P and P2, while the black box uses energy with power PA. Data: I = 0.2 A, P1 = 11 W, P2 = 37 W, PA = 40 W. (a) What is the potential drop Vah on the resistor? Vab (b) What i the resistance R of the resistor? R Ω %3D

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter29: Direct Current (dc) Circuits

Section: Chapter Questions

Problem 91PQ

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