Answered: 1. All magnetic fields originate in A.…

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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1. All magnetic fields originate in
A. iron atoms B. permanent magnets C. magnetic domains D. moving electric charges
2. The magnetic field lines around a long, straight current are in the form of
A. straight lines parallel to the current
B. straight lines that radiate perpendicularly from the current, like the spokes of a wheel
C. concentric circles centered on the current
D. concentric helixes whose axis is the current
3. Inside a solenoid the magnetic field
A. is zero
B. is uniform
C. increases with distance from the axis
D. decreases with distance from the axis
4. An electron enters a magnetic field parallel to B. The electron's,
A. motion is unaffected B. direction is changed C. speed is changed D. energy is changed
5. An electron enters a magnetic field perpendicularly to B. The electron's
A. motion is unaffected
B. direction is changed
C. speed is changed
D. energy is changed
6. The magnetic field of a bar magnet most closely resembles the magnetic field of
A. a straight current-carrying wire
B. a stream of electrons moving parallel to one another
C. a current carrying wire loop
D. a horseshoe magnet
7. The magnetic field 2 cm from a long, straight wire is 10-6 T. The current in the wire is
C. 1 A
A. 0.01 A
B. 0.1 A
D. 10 A
8.The magnetic field inside a 100-turn 20 mm long that carries a 10-A current is
C. 0.063 T
D. 0.13 T
A. 0.00063 T
B. 0.0013 T
9. The Biot-Savart law is similar to Coulomb's law in that both
A. are inverse square laws
B. deal with excess charges
C. include the permeability of free space
D. are not electrical in nature
10. Which of the following laws states that net magnetic flux through any closed surface is always
zero?
C. Gauss's Law
A. Ampere's Law
D. Lenz's Law
B. Faraday's Law

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3. Inside a solenoid the magnetic field A. is zero B. is uniform C. increases with distance from the axis D. decreases with distance from the axis 4. An electron enters a magnetic field parallel to B. The electron's, A. motion is unaffected B. direction is changed C. speed is changed D. energy is changed 5. An electron enters a magnetic field perpendicularly to B. The electron's A. motion is unaffected B. direction is changed C. speed is changed D. energy is changed 6. The magnetic field of a bar magnet most closely resembles the magnetic field of A. a straight current-carrying wire B. a stream of electrons moving parallel to one another C. a current carrying wire loop D. a horseshoe magnet

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