1. Magnetic poles that are alike each other. each other, magnetic poles that are not alike repel, attract B. attract, repel C. repel, also repel D. attract, also attract
1. Magnetic poles that are alike each other. each other, magnetic poles that are not alike repel, attract B. attract, repel C. repel, also repel D. attract, also attract
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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Please answer all of the questions pictured below by selecting the correct answer choice for each please. Thank you
Transcribed Image Text:## Magnetic Fields and Forces
### Multiple Choice Questions and Explanations
1. **Magnetic poles that are alike _______ each other; magnetic poles that are not alike _______ each other.**
- A. repel, attract
- B. attract, repel
- C. repel, also repel
- D. attract, also attract
- **Answer:** A. repel, attract
2. **The direction of any magnetic field is defined as the direction the _______ pole of a magnet would point if placed in the field. The magnetic field of a magnet points from the _______ pole of the magnet to the _______ pole of the magnet.**
- A. south, north, south
- B. north, south, north
- C. south, south, north
- D. north, north, south
- **Answer:** B. north, south, north
3. **A magnetic field exists around any current-carrying wire; the direction of the magnetic field follows a(n) _____________ the wire.**
- A. zigzag path around
- B. circular path around
- C. straight path through
- D. unpredictable path around or through
- **Answer:** B. circular path around
4. **Two parallel current-carrying wires exert on one another forces that are equal in magnitude and opposite in direction. If the currents are in the same direction, the two wires _______ one another. If the currents are in opposite directions, the wires _______ one another.**
- A. attract, repel
- B. repel, attract
- C. attract, also attract
- D. repel, also repel
- **Answer:** A. attract, repel
5. **How can you make a magnet out of a long strand of wire and an iron bar?**
- a. Wrap the wire around the bar, and send a current through it.
- b. Attach the wire to either end of the bar, and send a current through it.
- c. Send a current through the bar.
- d. Spin the bar over the wire as a current runs through it.
- **Answer:** a. Wrap the wire around the bar, and send a current through it.
6. **The second right-hand rule is used to determine the ___________.**
![**Question 10:**
An electron is moving with a speed of \(3.5 \times 10^5 \, \text{m/s}\) when it encounters a magnetic field of \(0.60 \, \text{T}\). The direction of the magnetic field makes an angle of \(60.0^\circ\) with respect to the velocity of the electron. What is the magnitude of the magnetic force on the electron?
Options:
A) \(4.9 \times 10^{-13} \, \text{N}\)
B) \(3.2 \times 10^{-13} \, \text{N}\)
C) \(1.7 \times 10^{-13} \, \text{N}\)
D) \(3.4 \times 10^{-14} \, \text{N}\)
E) \(2.9 \times 10^{-14} \, \text{N}\)
**Question 11:**
An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown.
[Diagram: A region depicted with crosses indicating the magnetic field direction into the page]
Which one of the following phrases most accurately describes the motion of the electron once it has entered the field?
Options:
A) upward and parabolic
B) upward and circular
C) downward and circular
D) upward, along a straight line
E) downward and parabolic
**Question 12:**
A \(0.150 \, \text{m}\) wire oriented horizontally between the poles of an electromagnet carries a direct current of \(12.5 \, \text{A}\). The angle between the direction of the current and that of the magnetic field is \(25.0^\circ\). If the magnetic field strength is \(0.625 \, \text{T}\), what is the magnitude and direction of the magnetic force on the wire between the poles?
[Diagram: Wire at an angle with a magnetic field vector]
Options:
A) \(1.17 \, \text{N, upward}\)
B) \(3.30 \, \text{N, downward}\)
C) \(0.792 \, \text{N, upward}\)
D) \(1.44 \, \text{N, downward}\)
E) \(0.495 \](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F281e2029-de70-4b7c-8ebc-bf0179904e66%2F25a3df2e-86ad-4cf2-875f-7b2ffd4e179f%2F28e4c8c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Question 10:**
An electron is moving with a speed of \(3.5 \times 10^5 \, \text{m/s}\) when it encounters a magnetic field of \(0.60 \, \text{T}\). The direction of the magnetic field makes an angle of \(60.0^\circ\) with respect to the velocity of the electron. What is the magnitude of the magnetic force on the electron?
Options:
A) \(4.9 \times 10^{-13} \, \text{N}\)
B) \(3.2 \times 10^{-13} \, \text{N}\)
C) \(1.7 \times 10^{-13} \, \text{N}\)
D) \(3.4 \times 10^{-14} \, \text{N}\)
E) \(2.9 \times 10^{-14} \, \text{N}\)
**Question 11:**
An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown.
[Diagram: A region depicted with crosses indicating the magnetic field direction into the page]
Which one of the following phrases most accurately describes the motion of the electron once it has entered the field?
Options:
A) upward and parabolic
B) upward and circular
C) downward and circular
D) upward, along a straight line
E) downward and parabolic
**Question 12:**
A \(0.150 \, \text{m}\) wire oriented horizontally between the poles of an electromagnet carries a direct current of \(12.5 \, \text{A}\). The angle between the direction of the current and that of the magnetic field is \(25.0^\circ\). If the magnetic field strength is \(0.625 \, \text{T}\), what is the magnitude and direction of the magnetic force on the wire between the poles?
[Diagram: Wire at an angle with a magnetic field vector]
Options:
A) \(1.17 \, \text{N, upward}\)
B) \(3.30 \, \text{N, downward}\)
C) \(0.792 \, \text{N, upward}\)
D) \(1.44 \, \text{N, downward}\)
E) \(0.495 \
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