Electrical Engineering: Principles & Applications (7th Edition)
7th Edition
ISBN: 9780134484143
Author: Allan R. Hambley
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 14, Problem 14.9P
A long copper pipe carries a dc current. Is there a magnetic field inside the pipe due to the current? Outside? Justify your answers.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A magnetic pole face has a rectangular section having dimensions 200 mm by 100 mm. If the total flux emerging from the pole is 150 µWb.
a) If the emerging flux of the pole is changed to 100µWb what will be the resultant density?c) When the dimensions of the magnetic pole are changed to 10m and 5m what will be the new density?d) What would happen if the magnetic pole is changed to square?
Q20
The statement is True or False?
A current carrying conductor placed in a magnetic field experience a force, is it true for motor?
The magnetic structure shown in the figure is built with a material whose magnetization curve is expressed by: (See image with the equation)
The length of the mean magnetic path in the core is equal to 0.75 m. The measurements of the cross section are 6 × 8 cm 2. The length of the air gap is 2 mm and the flux in it is equal to 4 mWb (in the direction indicated in the Figure). Determine the number of turns in coil B.
Ans: NB =1,237 turns (I need the procedure)
Chapter 14 Solutions
Electrical Engineering: Principles & Applications (7th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- . Consider two wires of length 1m carrying currents i1 = 2A and i2 = 4A with directionindicated in the following figure. So answer what is asked.(a) What is the resultant magnetic field strength at point P in the figure?(b) Determine the distance d for the current cable i1 from a point Q where the field strengthresulting magnetic field is zero.(c) What would happen to the magnetic field strength if the current i1 were 4A?arrow_forwardAnswer the following: a. What happens to the magnetic field produced by the electromagnet if some parts of the wire windings overlap each other? b. What happens to the magnetic force produced by the electromagnet if you reverse the terminal connections?c.Are there any patterns with the attractive and repulsive force observed with different configurations (pos-pos terminal & pos-neg terminal)? Explain the pattern.arrow_forwardA current carrying conductor placed in a magnetic field experience a force, is it true for motor? Select one: O True O Fals?arrow_forward
- Determine the emf generated by a 4pole simplex lap woumd armature having 300 conductors running at 900 rpm. The flux per pole is 50 mWb. Determine the number of poles needed to generate an emf almost twice its value.arrow_forwardA square magnetic core has a mean length of 43 cm and a cross-sectional area of120cm2. A coil of 200 turns of wire is wound around one of the columns of the core, thewhich is made of a material whose required magnetic field strength is H=115 Aturns/m. a) How much current is required to produce a flux of 0.012 Wb, in the core?b) What is the relative permeability of the core for that current?c) What is the reluctance?arrow_forwardUsing Bio-Savart's law, determine the magnetic flux density produced by a single turn ofa current carrying loop. Consider ONLY the magnetic field along the axis of the loop.Assume that the radius of the loop is 'a', the current carried by the loop is 'l'. Otherparameters retain the standard units.arrow_forward
- Find the numerical values of the magnetic field created by the L length wire piece with constant I current flowing through it at the P points shown in the figures below (I=10A, a=20cm)arrow_forwardGiven: flux per pole = 1,900,000 maxwells; pole pitch = 6.25; gross length of armature core = 10 inches. Calculate the maximum value of the air-gap density if the flux distribution is sinusoidal. (ILLUSTRATIONS such as diagrams and graphs are Required).arrow_forwardDETERMINE THE EMF GENERATED BY A 4-POLE SIMPLEX LAP WOUND ARMATURE HAVING 300 CONDUCTORS RUNNING AT 900 RPM. THE FLUX PER POLE IS 50mWbarrow_forward
- Q1. A core with three legs is shown in Figure. Its depth is 5 cm, and there are 100 turns on the leftmost leg. The relative permeability of the core can be assumed to be 2000 and constant. What flux exists in each of the three legs of the core? What is the flux density in each of the legs? Assume a 5% increase in the effective area of the air gap due to fringing effects.arrow_forwardFrom a technicians standpoint, how is the stregth of an electromagnet typically varied? a) by varying the number of turns, b) by varying the current flow, C) by barying the core is permeability, d) none A bar of iron said to be saturated once most of its magnetic molecules are aligned whereby increases in magnetomotives force results in smaller and smaller increases in flux in the core. A) true, B) false which of the folloeing is?are tupe of AC genator construction. A) revolving field desing, B) stationary field desing, C) both a and b, D) nonearrow_forwardA 8 pole lap wound armature rotated at 350brpm is required to generate 260V. The useful flux per pole is about 0.05Wb. If the armature has 120 slots, calculate no.of conductor per slot and hence determine the actual value of flux required to generate the same voltage for wave wound.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSON
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Programmable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill Education
Electric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSON
Engineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:9780078028229
Author:Charles K Alexander, Matthew Sadiku
Publisher:McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:9780134746968
Author:James W. Nilsson, Susan Riedel
Publisher:PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:9780078028151
Author:Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:Mcgraw-hill Education,
8.02x - Lect 21 - Magnetic Materials, Dia- Para- & Ferromagnetism; Author: Lectures by Walter Lewin. They will make you ♥ Physics.;https://www.youtube.com/watch?v=1xFRtdN5IJA;License: Standard Youtube License