(II) Suppose a straight 1.00-mm-diameter copper wirecould just “float" horizontally in air because of the forcedue to the Earth's magnetic field B, which is horizontal,perpendicular to the wire, and of magnitude 5.0 × 10-5 T.What current would the wire carry? Does the answer seemfeasible? Explain briefly.

Given: B→ = 5.0 × 10-5 T Diameter = 1.00 m or radius = 0.5 m Length of copper wire L = 1 m (let) To…

Answered: (II) Suppose a straight…

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) A wire is held horizontally in a vacuum chamber, and carries a current of 3.65 µA. A proton is traveling in a direction parallel to the wire (opposite the current) with a constant speed of 2.50 × 10ª m/s at a distance d above the wire. Ignoring the magnetic field due to the Earth, determine the value of d (in cm). cm (b) What If? At what distance d (in m) would an electron moving with the same speed as the proton move parallel to the wire? What direction would the electron have to move? In the same direction as the proton. In the opposite direction as the proton. There is too little information to determine the direction.
What would be the magnitude and direction of force FB on an electron (q = -e, me = 9.1 x 10-31 kg) shot in the +y direction with a speed of 4.7 x 106 m/s in a uniform magnetic field B = 2.6 x 10-4 T along +y direction ? FB = 2.4 x 10-16 N away from us, towards the plane of the screen FB = 0.00 N so will maintain its velocity. FB = 1.95 x 10-16 N toward us, away from the plane of the screen FB = 4.9 x 10-11 N away from us, towards the plane of the screen
(I) Find the force (magnitude and direction) on a proton traveling 3.72 x 105 m/s horizontally to the west in a vertically upward magnetic field of strength 1.40 T. magnitude N direction to the north to the west to the east to the south
(c) Two long, parallel wires are separated by a distance of 2.5 cm. The force per unit length that each wire exerts on the other is 4×10−5 N/m, and the wires repel each other. The current in one wire is 0.60 A. Determine the magnitude and direction of the current flowing in the second wire.
Two long, straight wires are parallel and 23 cm apart. (a) If each wire carries a current of 53 A in the same direction, what is the magnitude of the magnetic force per meter (in N/m) exerted on each wire? N/m (b) Does the force pull the wires together or push them apart? O The wires are pulled together. O The wires are pushed apart. O The magnetic force per meter is zero. (c) What happens if the currents flow in opposite directions? O The wires are pulled together. O The wires are pushed apart. O The magnetic force per meter is zero.
RP
(Figure 1) shows a mass spectrometer, an analytical instrument used to identify the various molecules in a sample by measuring their charge-to- mass ratio q/m. The sample is ionized, the positive ions are accelerated (starting from rest) through a potential difference AV, and they then enter a region of uniform magnetic field. The field bends the ions into circular trajectories, but after just half a circle they either strike the wall or pass through a small opening to a detector. As the accelerating voltage is slowly increased, different ions reach the detector and are measured. Consider a mass spectrometer with a 200.00 mT magnetic field and an 8.0000 cm spacing between the entrance and exit holes. igure + AV d Detector Part A To five significant figures, what accelerating potential difference AV is required to detect the ion O,? The masses of the atoms are shown in the table; the mass of the missing electron is less than 0.001 u and is not relevant at this level of precision. Use…
(c) A conducting rod, with ends P and Q, moves with a constant velocity of u = 3 m/s next to a long straight wire carrying a current of I = 15 A, as in Figure 4.2. [Suatu rod pengalir, dengan hujung P dan Q, bergerak dengan kelajuaan malar u = 3 m/s di sebelah suatu wayar lurus panjang yang membawa arus 1= 15 A, seperti di dalam Rajah 4.2. Calculate the e.m.f induced in the rod at t = 5 s. [Kira d.g.e yang teraruh di dalam rod tersebut pada t = 5s] (ii) Identify the end of the rod with the higher potential. [Kenalpasti hujung rod yang mempunyai keupayaan yang lebih tinggi.] /= 15 A Figure 4.2 |Rajah 4.2] (X) U= 0.4 cm 3 m/s
(a) A 200-turn circular loop of radius 50.0 cm is vertical, with its axis on an east-west line. A current of 100 A circulates clockwise in the loop when viewed from the east. The Earth’s field here is due north, parallel to theground, with a strength of 3.00 X 10-5 T . What are the direction and magnitude of the torque on the loop? (b) Does this device have any practical applications as a motor?
Suppose we have set up a magnetic field along the +y-direction with a field strength of 0.05T. If a proton is movingat a speed of 2.50×106m/s at an angle of 40o with the direction of a magnetic field what is the acceleration experienced by the proton?
A wire experiences a maximum force of 6.9 × 10-2 N when placed between the poles ofhorseshoe magnet. The magnetic field is 0.22 T is vertically uniform. The wire is observed tomove toward the observer when the current flows horizontally to the right.(a) What is the direction of magnetic field?(b) What is the type of the top pole?(c) Estimate the magnitude of the current, if the pole faces have a diameter of 8 cm
Suppose a straight 1.75 mmmm -diameter copper wire could just "float" horizontally in the air because of the force due to the Earth's magnetic field B B→, which is horizontal, perpendicular to the wire, and of magnitude 4.5×10−5 T. What current would the wire carry?

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