m The figure shows three very long wires with linear mass density 42. The wires run perpendicular to the page and each carry equal currents in the directions shown. The lower two wires are 6.3 cm apart and are fixed in place. What current will allow the upper wire to be suspended to form an isosceles triangle with the lower wires with the two bottom angles in the triangle being 55°?

m The figure shows three very long wires with linear mass density 42. The wires run perpendicular to the page and each carry equal currents in the directions shown. The lower two wires are 6.3 cm apart and are fixed in place. What current will allow the upper wire to be suspended to form an isosceles triangle with the lower wires with the two bottom angles in the triangle being 55°?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 34PE: (a) What is the force per meter on a lightning bolt at the equator that carries 20,000 A...

See similar textbooks

Similar questions

Current flows along a thin, infinite sheet as shown in the accompanying figure. The current per unit length along the sheet is J in amperes per meter, (a) Use the Biot-Savart law to show that B=0J/2 on either side of the sheet. What is the direction of B on each side? (b) Now use Ampere’s law to calculate the field.
Answer each question yes or no. (a) Is it possible for each of three stationary charged particles to exert a force of attraction on the other two? (b) Is it possible for each of three stationary charged particles to repel both of the other particles? (c) Is it possible for each of three current-carrying metal wires to attract the other two wires? (d) Is it possible for each of three current-carrying metal wires to repel the other two wires? André-Marie Ampère’s experiments on electromagnetism are models of logical precision and included observation of the phenomena referred to in this question.
A hollow copper tube carries a current along its length. Why is B = 0 inside the tube? Is B nonzero outside the tube?
Answer each question yes or no. (a) Is it possible for each of three stationary charged particles to exert a force of attraction on the other two? (b) Is it possible for each of three stationary charged particles to repel both of the other particles? (c) Is it possible for each of three current-carrying metal wires to attract the other two wires? (d) Is it possible for each of three currents carrying metal wires to repel the other two wires? Andre-Marie Amperes experiments on electromagnetism are models of logical precision and included observation of the phenomena referred to in this question.
In a long, .straight, vertical lightning stroke, electrons move downward and positive ions move upward and constitute a current of magnitude 20.0 kA. At a location 50.0 m east of the middle of the stroke, a free electron drifts through the air toward the west with a speed of 300 m/s. (a) Make a sketch showing the various vectors involved. Ignore the effect of the Earth's magnetic field. (b) Find the vector force the lightning stroke exerts on the electron. (c) Find the radius of the electrons path. (d) Is it a good approximation to model the electron as moving in a uniform field? Explain your answer. (e) If it does not collide with any obstacles, how many revolutions will the electron complete during the 60.0-s duration of the lightning stroke?
, A ray long, thick, cylindrical wire of radius R carries a current density J that varies across its cross-section, The magnitude of the current density7 at a point a distance r from the center of the wine is given by J=J0rR where J0 is a constant. Find the magnetic field (a) at a point outside the wire and (b) at a point inside the wire. Write your answer in terms of the net current I through the wire.
(a) What is the force per meter on a lightning bolt at the equator that carries 20,000 A perpendicular to the Earth's 3.00105-T field? (b) What is the direction of the force it the current is straight up and the Earth’s field direction is due north, parallel to the ground?
The current density in the long, cylindrical wire shown in the accompanying figure varies with distance r from the center of the wire according to J = cr. where c is a constant (a) What is the current through the wire? (b) What is the magnetic field produced by this current for r < R? For rR ?
Explain why B=0 inside a long, hollow copper pipe that is carrying an electric current parallel to the axis. Is B=0 outside the pipe?
A laboratory electromagnet produces a magnetic field of magnitude 1.50 T. A proton moves through this field with a speed of 6.00 106 m/s. (a) Find the magnitude of the maximum magnetic force that could be exerted on the proton. (b) What is the magnitude of the maximum acceleration of the proton? (c) Would the field exert the same magnetic force on an electron moving through the field with the same speed? (d) Would the electron undergo the same acceleration? Explain.
Figure 22.30 (Quick Quiz 22.6) Four closed paths around three current-carrying wires. Rank the magnitudes of Bds for the closed paths a through d in Figure 22.30, from greatest to least.
A proton moves at 7.50107m/s perpendicular to a magnetic field. The field causes the proton to travel in a circular path of radius 0.800 m. What is the field strength?