Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 26, Problem 49P
A simplified model of Earth’s magnetic field has it originating in a single current loop at the outer edge of the planet’s liquid core (radius 3000 km). What current would give the 62-µT field measured at the north magnetic pole?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Plants can communicate using electrical signals. If a current of 8.8 x 10-9 A flows through a plant, what is the strength of its magnetic field at a distance r = 0.005 m?
Give your answer in scientific notation, to two significant figures with the units.
permeability constant (μ0) = 1.26 x 10-6 Tm/A
Calculations:
Answer:
2. Electric currents in excess of 10 mA (0.01 A) can produce painful shocks. Currents exceeding 100 mA (0.1 A) can be fatal. If a wet human has a resistance of 1700 Ω, and the household voltage is 110 V, what current can potentially flow through the human?
Give your answer in decimal notation, to two significant figures with the units.
Ohm’s law:
Calculations:
Answer:
If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×10−4T×10−4T) at a distance of 28 cmcm from the wire, what is the maximum current the wire can carry?
Express your answer to two significant figures and include the appropriate units.
I= ?
Although the evidence is weak, there has been concern in recent years over possible health effects from the magnetic fields generated by transmission lines. A typical high-voltage transmission line is 20 m off the ground and carries a current of 200 A. Estimate the magnetic field strength on the ground underneath such a line. What percentage of the earth’s magnetic field does this represent?
Chapter 26 Solutions
Essential University Physics
Ch. 26.2 - The figure shows a proton in a magnetic field. (1)...Ch. 26.3 - A proton of the same energy as the electron in...Ch. 26.4 - Prob. 26.4GICh. 26.5 - Prob. 26.5GICh. 26.6 - Prob. 26.6GICh. 26.7 - Which of the following best describes the...Ch. 26.8 - The figure shows three parallel wires carrying...Ch. 26 - An electron moving with velocity v through a...Ch. 26 - A magnetic field points out of this page. Will a...Ch. 26 - Do particles in a cyclotron gain energy from the...
Ch. 26 - Two identical particles carrying equal charge are...Ch. 26 - Prob. 5FTDCh. 26 - Do currents in the same direction attract or...Ch. 26 - If a current is passed through an unstretched...Ch. 26 - Figure 26.38 shows some magnetic field lines...Ch. 26 - Prob. 9FTDCh. 26 - Prob. 10FTDCh. 26 - Find (a) the minimum magnetic field needed to...Ch. 26 - An electron moving at right angles to a 0.10-T...Ch. 26 - Find the magnitude of the magnetic force on a...Ch. 26 - The magnitude of Earths magnetic field is about...Ch. 26 - A velocity selector uses a 60-mT magnetic field...Ch. 26 - Prob. 16ECh. 26 - How long: does it take an electron to complete a...Ch. 26 - Radio astronomers detect electromagnetic radiation...Ch. 26 - Prob. 19ECh. 26 - Two protons, moving in a plane perpendicular to a...Ch. 26 - Find the magnitude of the force on a 65.5-cm-long...Ch. 26 - A wire carrying 15 A makes a 25 angle with a...Ch. 26 - In an experimental nuclear fusion reactor, plans...Ch. 26 - A wire with mass per unit length 75 g/m runs...Ch. 26 - A wire carries 6.71 A. You form it into a...Ch. 26 - A single-turn wire loop is 2.0 cm in diameter and...Ch. 26 - A 2.2-m-long wire carrying 3.5 A is wound into a...Ch. 26 - Whats the current in a long wire if the magnetic...Ch. 26 - In standard household wiring, parallel wires about...Ch. 26 - Earths magnetic dipole moment is 8.01022 Am2. Find...Ch. 26 - A single-turn square wire loop 18.0 cm on a side...Ch. 26 - An electric motor contains a 250-turn circular...Ch. 26 - The line integral of the magnetic field on a...Ch. 26 - The magnetic field shown in Fig. 26.39 has uniform...Ch. 26 - Number 12 gauge wire, commonly used in household...Ch. 26 - Prob. 36ECh. 26 - A superconducting solenoid has 3300 turns per...Ch. 26 - Example 26.2: Chlorine is an unusual element in...Ch. 26 - Example 26.2: You’re trying to measure arsenic...Ch. 26 - Example 26.2: A beam of elections is initially...Ch. 26 - Example26.2: The mass spectrometer described in...Ch. 26 - Example 26.7: A long, straight wire 9.27 mm in...Ch. 26 - Example 26.7: Niobium-tin, a commonly used...Ch. 26 - Prob. 44ECh. 26 - Example 26.7: A coaxial cable like the one...Ch. 26 - Prob. 46PCh. 26 - Jupiter has the strongest magnetic field in our...Ch. 26 - A proton moving with velocity v1 = 3.6 104 m/s...Ch. 26 - A simplified model of Earths magnetic field has it...Ch. 26 - Before the advent of today’s flat-screen...Ch. 26 - Show that the orbital radius of a charged particle...Ch. 26 - Prob. 52PCh. 26 - Prob. 53PCh. 26 - Prob. 54PCh. 26 - Youre designing a prosthetic ankle that includes a...Ch. 26 - A 20-cm-long conducting rod with mass 18 g is...Ch. 26 - Prob. 57PCh. 26 - Nuclear magnetic resonance (NMR) is a technique...Ch. 26 - A wire carrying 1.5 A passes through a 48-mT...Ch. 26 - Your smartphone contains a magnetometer that uses...Ch. 26 - A single piece of wire carrying current I is bent...Ch. 26 - You and a friend get lost while hiking, so your...Ch. 26 - Part of a long wire carrying current I is bent...Ch. 26 - A long, straight wire carries a 25-A current. A...Ch. 26 - A long conducting rod of radius R carries a...Ch. 26 - A long, hollow conducting pipe of radius R carries...Ch. 26 - You have 10 m of 0.50-mm-diameter copper wire and...Ch. 26 - Prob. 69PCh. 26 - The largest lightning strikes have peak currents...Ch. 26 - Prob. 71PCh. 26 - Prob. 72PCh. 26 - Prob. 73PCh. 26 - A circular wire loop of radius 15 cm and...Ch. 26 - Prob. 75PCh. 26 - A long, hollow conducting pipe of radius R and...Ch. 26 - A solid conducting wire of radius R runs parallel...Ch. 26 - A disk of radius a carries uniform surface charge...Ch. 26 - Youre developing a system to orient an orbiting...Ch. 26 - Prob. 80PCh. 26 - Prob. 81PCh. 26 - Find an expression for the magnetic field at the...Ch. 26 - Prob. 83PCh. 26 - A Helmholtz coil is a pair of identical circular...Ch. 26 - Prob. 85PCh. 26 - Derive Equation 26.20 by considering the current...Ch. 26 - Your roommate is sold on magnet therapy, a sham...Ch. 26 - A toroid is a solenoid-like coil bent into a...Ch. 26 - A toroid is a solenoid-like coil bent into a...Ch. 26 - A toroid is a solenoid-like coil bent into a...Ch. 26 - A toroid is a solenoid-like coil bent into a...
Additional Science Textbook Solutions
Find more solutions based on key concepts
The Viking experiments found (a) no evidence of life on Mars; (b) clear evidence of life on Mars; (c) results t...
Life in the Universe (4th Edition)
1. When is energy most evident?
Conceptual Physics (12th Edition)
The recoil speed of the person and the skateboard relative to the ground.
Physics (5th Edition)
The force exerted by an unusual spring when its compressed a distance x from equilibrium is F = kx cx3, where ...
Essential University Physics (3rd Edition)
If a potentiometer is used to measure cell emfs on the order of a few volts, why is it most accurate for the st...
College Physics
37.26 Relativistic Baseball. Calculate the magnitude of the force required to give a 0.145-kg baseball an accel...
University Physics with Modern Physics (14th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- An alpha-particle ( m=6.641027kg , q=3.21019C ) travels in a circular path of radius 25 cm in a uniform magnetic field of magnitude 1.5 T. (a) What is the speed of the particle? (b) What is the kinetic energy in electron-volts? (c) Through what potential difference must the particle be accelerated in order to give it this kinetic energy?arrow_forwardA particle moving downward at a speed of 6.0106 m/s enters a uniform magnetic field that is horizontal and directed from east to west. (a) If the particle is deflected initially to the north in a circular arc, is its charge positive or negative? (b) If B = 0.25 T and the charge-to-mass ratio (q/m) of the particle is 40107 C/kg. what is ±e radius at the path? (c) What is the speed of the particle after c has moved in the field for 1.0105s ? for 2.0s?arrow_forwardAn electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)arrow_forward
- A 0.50-kg copper sheet drops through a uniform horizontal magnetic field of 1.5 T, and it reaches a terminal velocity of 2.0 m's. (a) What is the net map,-, eh: force on the sheet after it reaches terminal velocity? (b) Describe the mechanism responsible for this force, (c) How much power is dissipated as Joule heating while the sheet moves at terminal velocity?arrow_forwardA strip of copper is placed in a uniform magnetic field of magnitude 2.5 T. The Hall electric field is measured to be 1.5103V/m (a) What is the drift speed of the conduction electrons? (b) Assuming that n =8.01028 elections per cubic meter and that the cross-sectional area of the strip is 5.0106m2 , calculate the current in the ship, (c) What is the Hall coefficient 1/nq?arrow_forwardAt a place, the horizontal component of earth’s magnetic field is B and angle of dip is 60°. What is the value of the earth’s magnetic field at equator?arrow_forward
- A solenoid used to produce magnetic fields for research purposes is 2.7 m long, with an inner radius of 68 cm and 3.4 x 104 turns of wire. When the current is 300 A, what is the magnitude of the magnetic field inside of the solenoid, in Tesla? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forwardA solenoid is made of 500 turns of wire, length = 12 cm, radius = 3 cm, and carries a current of 15 amps. What is the magnetic field in the center if it has an air core? What is the magnetic flux through the solenoid? What would be the magnetic field if the air core was replaced with an iron core with K= 2000?arrow_forwardA hypothetical charge of 31 pC with a mass of 77 fg has a speed of 48 km/s and is ejected southward entering a uniform magnetic field of unknown magnitude and direction. If the path traced is clockwise, K A. Find the magnitude and direction of the magnetic field that will cause the charge to follow a semicircular path (given the diameter of 18 m). B. Find the time required for the charge to complete a semi-circular path from point K to point L. C. Find the magnitude and the direction of the magnetic force at point L.arrow_forward
- At what distance, in centimeters, from the central axis of a long straight thin wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 x 10-5 T? (HO = 47 × 10-7 T · m/A) %3D Three charges are placed along a horizontal line at equal distances from each other. The charges are labelled from left to right as Q1, Q2, and Q3. Electric field lines to the left from charge Q1 and to the right from charge Q3, run straight away from the corresponding charges. Field lines between the charges run towards the middle charge from the lateral charges, forming bent curves. What are the signs of the three charges?arrow_forwardA high-voltage power line 20 m above the ground carries a current of 2 000 A. What is the magnetic field (in ×10-6 T) due to the current directly underneath the power line?arrow_forwardA hypothetical charge 36 pC with mass 72 fghas a speed of 53 km/s and is ejected southward entering a uniform magnetic field of unknown magnitude and direction. If the path traced is clockwise, A. Find the magnitude and direction of the magnetic field that will cause the charge to follow a semicircular path (given the diameter 23 m). B. Find the time required for the charge to complete a semi-circular path from point K to point L. C.Find the magnitude and the direction of the magnetic force at point L. What are the given in the problem? What are the unknown variables? What are the equations that you are going to use? Solution and answer for Part A. Solution and answer for Part B. Solution and answer for Part C. Use GRESA format in answering.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Magnets and Magnetic Fields; Author: Professor Dave explains;https://www.youtube.com/watch?v=IgtIdttfGVw;License: Standard YouTube License, CC-BY