(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
(a) Aircraft sometimes acquire small static charges. Suppose a supersonic jet has a 0.500-μC charge and flies due west at a speed of 660. m/s over Earth’s south magnetic pole, where the 8.00 × 10−5 − T magnetic field points straight down into the ground. What are the direction and the magnitude of the magnetic force on the plane? (b) Discuss whether the value obtained in part (a) implies this is a significant or negligible effect.
(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 DC power line for a light-rail system carries 1000 A at an angle of 30.0° to the Earth's 5.00 × 10-5-T field. What is the force on a 100-m section of this line?
(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?
(a) A 0.140-kg baseball, pitched at 40.0 m/s horizontally and perpendicular to the Earth’s horizontal 5.00×10−5 T field, has a 100-nC charge on it. What distance is it deflected from its path by the magnetic force, after traveling 30.0 m horizontally? (b) Would you suggest this as a secret technique for a pitcher to throw curve balls?

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