. A2-wire d.c. distributor AB, 1000 m long has a total resistance of 0-12 The ends A and B are fed at 240 V. The distributor is uniformly loaded at 0.5 A/metre length and has concentrated loads of 120 A, 60 A, 100 A and 40 A at points distant 200, 400, 700 and 900 m respectively from end A. Calculate: () the point of minimum potential (ii) value of minimum potential (iii) current fed at both ends [6) 400 m from A (ii) 231-76 V (iii) I, = 366 A ; Ig = 454 A]

. A2-wire d.c. distributor AB, 1000 m long has a total resistance of 0-12 The ends A and B are fed at 240 V. The distributor is uniformly loaded at 0.5 A/metre length and has concentrated loads of 120 A, 60 A, 100 A and 40 A at points distant 200, 400, 700 and 900 m respectively from end A. Calculate: () the point of minimum potential (ii) value of minimum potential (iii) current fed at both ends [6) 400 m from A (ii) 231-76 V (iii) I, = 366 A ; Ig = 454 A]

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Dielectric Breakdown

A dielectric is a material with low electrical conductivity and so is classified as an insulator. Dielectric materials are used to block the flow of electricity through them, allowing them to behave as an insulators. They can also be used to store electric charge or improve capacitance.Dielectrics have no free electrons for conduction because electrons are tightly bound to the nucleus. Because dielectrics contain a small number of electrons for electrical conductivity, they have a dipole. The two primary roles of dielectrics in electrical devices are insulation and electrical energy storage. An electric field polarizes the dielectric, and the polarization of the molecules allows dielectric materials to store charge.

Question

1. A2-wire d.c. distributor AB, 1000 m long has a total resistance of 0-12. The ends A and B are fed at 240
V. The distributor is uniformly loaded at 0.5 A/metre length and has concentrated loads of 120 A, 60
A, 100 A and 40 A at points distant 200, 400, 700 and 900 m respectively from end A. Calculate:
() the point of minimum potential
(ii) value of minimum potential
(iii) current fed at both ends
[6) 400 m from A (iü) 231-76 V (iii) I, = 366 A ; I, = 454 A]

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