An electromagnetic rail gun uses magnetic forces to launch projectiles. (Figure 1) shows a 10-cm-long, 12 g metal wirethat can slide without friction along 1.0-m-long horizontal rails. The rails are connected to a 300 V source, and a0.10 T magnetic field fills the space between the rails. Each rail has linear resistivity λ = 0.10 /m, which means thatthe resistance is A multiplied by the length of rail through which current flows. Assume that the sliding wire and the leftend, where the voltage source is, have zero resistance. The wire is initially placed at x0 = 30 cm, then the switch isclosed.FigurePart AXXXx10 cmхX X×0.10 TX X+X X300 V×✗✗X X✗☑×××xWhat is the wire's speed as it leaves the rails?1 of 1

Answered: An electromagnetic rail gun uses…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A long horizontal wire AB rests on the surface of a table. See the figure below.Another wire, CD, vertically above the first is 0.40 m long and free to slide up and down on the two vertical metal guides C and D. The two wires are connected through the sliding contacts and carry a current of 300.0 A, with current flowing from A to B. The mass per unit length of the wire CD is 5.00x10-3 kg/m. In addition, there is a magnetic field, B=2.5x10-4T directed into the plane of the paper. The current in all sections of the wire is 300A. a) To what equilibrium height, h, will the wire CD rise? (Take g=l0 m/s2) b) The current is quickly turned off and the wire CD falls a distance of 5cm in 0.1s. Find the magnitude of the induced current in the circuit. Take the resistance of the circuit to be 0.1 Ohms c) Does the induced current flow, from A to B or from B to A? Explain your results.
A square shaped wire loop of sides D= 5L is placed in a magnetic field as shown in the figure. r is the radial distance from the given axis and tis the time coordinate. (The bottom and top sides are at r= Land r=L+D, respectively.) The magnitude of the magnetic field is given by 8r.1)=(9) V/s and the its direction is shown in the figure. The resistance of the square shaped wire is 4 2. What is the magnitude (in units of A) and the direction of the induced current on the the loop at time 68? 9.26, clockwise 9.26, counter-clockwise O54.00, clockwise 112.50, counter-clockwise 112.50, clockwise L D OB r D
A copper wire is 10.00 m long and has a cross-sectional area of 2.00 ✕ 10-4 m2. This wire forms a one turn loop in the shape of square and is then connected to a battery that applies a potential difference of 0.100 V. If the loop is placed in a uniform magnetic field of magnitude 0.400 T, what is the maximum torque that can act on it? The resistivity of copper is 1.7 ✕ 10-8 ·m.
Consider the mass spectrometer shown schematically in the figure below. The magnitude of the electric field between the plates of the velocity selector is 2.20 x 10³ V/m, and the magnetic field in both the velocity selector and the deflection chamber has a magnitude of 0.0300 T. Calculate the radius of the path for a singly charged ion having a mass m = 1.86 x 10-26 kg. x Need Help? X X P X m x x * % X x Detector array Velocity selector Bo, in X Read It X x X X É x x X X 100 V **** +9 Watch It X * x x * * * X x x X
Experiments to study vision often need to track the movements of a subject’s eye. One way of doing so is to have the subject sit in a magnetic field while wearing special contact lenses that have a coil of very fine wire circling the edge. A current is induced in the coil each time the subject rotates his eye. Consider an experiment in which a 20-turn, 6.0-mm-diameter coil of wire circles the subject’s cornea while a 1.0 T magnetic field is directed as shown. The subject begins by looking straight ahead. What emf is induced in the coil if the subject shifts his gaze by 5.0° in 0.20 s?
The Hall effect can be used to determine the density of mobile electrons in a conductor. A thin strip of the material being investigated is immersed in a magnetic field and oriented so that its surface is perpendicular to the field. In a particular measurement, the magnetic field strength was 0.723 T, the strip was 0.107 mm thick, the current along the strip was 2.83 A, and the Hall voltage between the strip's edges was 2.73 mV. Find the density n of mobile electrons in the material. The elementary charge is 1.602 x 10-1° C. n = -3 m
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kg. Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 945 V/m, and the magnetic fields in both the velocity selector and the deflection chamber have magnitudes of 0.900 T. Calculate the radius r of the path for a singly charged ion with mass m = 2.06 x 10-26 mm X x P x r Bo, in X x X X X X Photographic plate Bin Velocity selector x x x x + + 1₂ E x x x x X--- --- V X X x || 9 XA I x I x X X x x x X X
The loop in the figure is being pushed into the 0.20 T magnetic field at 45 m/s . The resistance of the loop is 0.50 N. (Figure 1) You may want to review (Pages 849 - 851) . Figure 1 of 1 V В 5.0 cm
The 12.0 cm long rod as shown moves at 4.00 m/s.What is the strength of the magnetic field if a 95.0 V emf isinduced?
loop. The magnetic field in this case is A vertically oriented square loop of copper wire falls from rest in a region in which the field B is horizontal, uniform, and perpendicular to the plane of the loop, into a field- free region, see (Figure 1). The side length of the loop is s and the wire diameter is d. The resistivity of copper is PR and the density of copper is pm. If the loop reaches its terminal speed while its upper segment is still in the magnetic-field region, find an expression for the terminal speed. Part I Find the emf. Express your answer in terms of the variables s, B, and v. ▸ View Available Hint(s) E = Ο ΑΣΦ Submit Figure Square loop of copper wire. Above this line: Buniform and horizontal Below this line: B=0 s = side length X X 1 of 1 X X X XBX X dwire diameter ↑ s = side length Part J Complete previous part(s) Part K Complete previous part(s) Part L Complete previous part(s) Part M Complete previous part(s) Part N Complete previous part(s) EVALUATE Uterminal Part…
A wire extends from x = - (infinity) to x = 0 on the x-axis, then turns and extends from y = 0 to y = (infinity) on the y-axis. The direction of the current is in the positive direction. What is the direction of the magnetic field at x = 5 m, y = 0m?

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