Question

Chapter 27, Problem 038 The figure shows a section of a circuit. The resistances are R1 = 2.0 2, R2 = 4.7 2, and R3 = 6.4 2, and the indicated current is i = 6.3 A. The electric potential difference between points A and B that connect the section to the rest of the circuit is VA-VB = 78 V. (a) is the device represented by "Box" absorbing or providing energy to the circuit, and (b) at what rate? (a) (b) Number Units the tolerance is +/-9% Click if you would like to Show Work for this question: Open Show Work

Answer 1

Ricar R₂-4.72 R = 6.40 in to n =4.7n Vuoi =iR į - 6.3A (6.3) (6.4) VA-VB = 7 8 v 40.32 V .: Vacions R, & 78-40.32 2) 37.68 volls .: I, - D 37.68 > 18.84 A .: Current through R, I, - i - 668.84) - 6.3 -> 12.54A VR) (12.54) (4.7) - 58.938 volls . Voot 40.32 - 58.938 => -18.62 volls (a) . It is providing energy (6) p-, VI (18.62) (12.54) - 233.47 watt - bot