2. (a) At what speed (in m/s) will a proton move in a circular path of the same radius as an electron that travels at 7.45 ✕ 106 m/s perpendicular to the Earth's magnetic field at an altitude where the field strength is 1.20 ✕ 10−5 T? m/s (b) What would the radius (in m) of the path be if the proton had the same speed as the electron? m (c) What would the radius (in m) be if the proton had the same kinetic energy as the electron? m (d) What would the radius (in m) be if the proton had the same momentum as the electron? m

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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2. (a)
At what speed (in m/s) will a proton move in a circular path of the same radius as an electron that travels at 7.45 ✕ 106 m/s perpendicular to the Earth's magnetic field at an altitude where the field strength is 1.20 ✕ 10−5 T?
m/s
(b)
What would the radius (in m) of the path be if the proton had the same speed as the electron?
m
(c)
What would the radius (in m) be if the proton had the same kinetic energy as the electron?
m
(d)
What would the radius (in m) be if the proton had the same momentum as the electron?
m
 
3. The magnetic field in a region of space is specified by its x, y, and z components which are respectively Bx = 0.145 T, By = 0.159 T, and Bz = 0.200 T. If a 30.0-cm wire carrying a current of 3.40 A is oriented along the z-axis with the current in the −z direction, determine the magnitude and direction of the force acting on the wire.
magnitude     N
direction     ° counterclockwise from the +x-axis

4. A 230-turn rectangular loop that is 24 cm long and 18 cm wide is placed in a 0.90-T magnetic field. If the maximum torque is 21 N · m, determine the current in the loop.
A

**Title: Understanding Magnetic Force on a Positive Charge**

**Introduction:**

This exercise explores the direction of the magnetic force on a positive charge moving in different magnetic field configurations. Using the right-hand rule, we can determine the force direction for each scenario.

**Diagrams and Explanations:**

Six scenarios (a, b, c, d, e, f) are presented, each depicting a positive charge moving in a magnetic field. The fields are represented with arrows or symbols (dots and crosses):

- **(a)**
  - Field: Directed into the page (denoted by crosses).
  - Velocity (\(\vec{v}\)): Downward.
  - Dropdown: Select the direction of force.

- **(b)**
  - Field (\(\vec{B}\)): Rightward.
  - Velocity (\(\vec{v}\)): Upward.
  - Dropdown: Select the direction of force.

- **(c)**
  - Field: Directed into the page (denoted by crosses).
  - Velocity (\(\vec{v}\)): Rightward.
  - Dropdown: Select the direction of force.

- **(d)**
  - Field (\(\vec{B}\)): Leftward.
  - Velocity (\(\vec{v}\)): Leftward.
  - Dropdown: Select the direction of force.

- **(e)**
  - Field (\(\vec{B}\)): Upward.
  - Velocity (\(\vec{v}\)): Into the page (denoted by a circle with a cross).
  - Dropdown: Select the direction of force.

- **(f)**
  - Field (\(\vec{B}\)): Leftward.
  - Velocity (\(\vec{v}\)): Into the page (denoted by a circle with a dot).
  - Dropdown: Select the direction of force.

**Selection Mechanism:**

Each case includes a dropdown menu for selecting the direction of the magnetic force based on the right-hand rule. The rule states that if you point your thumb in the direction of the velocity of a positive charge and your fingers in the direction of the magnetic field, the palm faces in the direction of the force.

**Conclusion:**

Understanding how magnetic forces act on charged particles is crucial in fields like physics and engineering. This exercise helps visualize the application of the right-hand rule in determining force direction.
Transcribed Image Text:**Title: Understanding Magnetic Force on a Positive Charge** **Introduction:** This exercise explores the direction of the magnetic force on a positive charge moving in different magnetic field configurations. Using the right-hand rule, we can determine the force direction for each scenario. **Diagrams and Explanations:** Six scenarios (a, b, c, d, e, f) are presented, each depicting a positive charge moving in a magnetic field. The fields are represented with arrows or symbols (dots and crosses): - **(a)** - Field: Directed into the page (denoted by crosses). - Velocity (\(\vec{v}\)): Downward. - Dropdown: Select the direction of force. - **(b)** - Field (\(\vec{B}\)): Rightward. - Velocity (\(\vec{v}\)): Upward. - Dropdown: Select the direction of force. - **(c)** - Field: Directed into the page (denoted by crosses). - Velocity (\(\vec{v}\)): Rightward. - Dropdown: Select the direction of force. - **(d)** - Field (\(\vec{B}\)): Leftward. - Velocity (\(\vec{v}\)): Leftward. - Dropdown: Select the direction of force. - **(e)** - Field (\(\vec{B}\)): Upward. - Velocity (\(\vec{v}\)): Into the page (denoted by a circle with a cross). - Dropdown: Select the direction of force. - **(f)** - Field (\(\vec{B}\)): Leftward. - Velocity (\(\vec{v}\)): Into the page (denoted by a circle with a dot). - Dropdown: Select the direction of force. **Selection Mechanism:** Each case includes a dropdown menu for selecting the direction of the magnetic force based on the right-hand rule. The rule states that if you point your thumb in the direction of the velocity of a positive charge and your fingers in the direction of the magnetic field, the palm faces in the direction of the force. **Conclusion:** Understanding how magnetic forces act on charged particles is crucial in fields like physics and engineering. This exercise helps visualize the application of the right-hand rule in determining force direction.
**Transcription for Educational Website:**

**Title: Determining the Direction of Magnetic Force on a Negative Charge**

**Introduction:**

In this exercise, we explore the direction of the magnetic force on a negative charge that moves in various orientations within a magnetic field. The task involves analyzing six different scenarios depicted in the figures below.

---

**Figures and Descriptions:**

**Figure (a):**
- Description: A vertical magnetic field \( \mathbf{B}_{\text{out}} \) is directed outward from the page, represented by dots. A negative charge moves downward with velocity \( \mathbf{v} \).
- Diagram Elements: 
  - Magnetic field (\( \mathbf{B}_{\text{out}} \)) represented by dots.
  - Velocity (\( \mathbf{v} \)) represented by an arrow pointing downward.
- Task: Select the direction of the magnetic force from the dropdown menu provided.

**Figure (b):**
- Description: A horizontal magnetic field \( \mathbf{B} \) runs left to right. A negative charge moves upward with velocity \( \mathbf{v} \).
- Diagram Elements:
  - Magnetic field (\( \mathbf{B} \)) represented by horizontal arrows pointing to the right.
  - Velocity (\( \mathbf{v} \)) represented by an upward arrow.
- Task: Choose the direction of the magnetic force.

**Figure (c):**
- Description: A magnetic field \( \mathbf{B}_{\text{in}} \) is directed inward into the page, represented by crosses. A negative charge moves to the right with velocity \( \mathbf{v} \).
- Diagram Elements:
  - Magnetic field (\( \mathbf{B}_{\text{in}} \)) represented by crosses.
  - Velocity (\( \mathbf{v} \)) represented by a rightward arrow.
- Task: Determine the direction of the magnetic force.

**Figure (d):**
- Description: A horizontal magnetic field \( \mathbf{B} \) runs from left to right. A negative charge moves to the left with velocity \( \mathbf{v} \).
- Diagram Elements:
  - Magnetic field (\( \mathbf{B} \)) represented by rightward arrows.
  - Velocity (\( \mathbf{v} \)) represented by a leftward arrow.
- Task: Select the magnetic force's direction.

**Figure (e):**
- Description: A vertical
Transcribed Image Text:**Transcription for Educational Website:** **Title: Determining the Direction of Magnetic Force on a Negative Charge** **Introduction:** In this exercise, we explore the direction of the magnetic force on a negative charge that moves in various orientations within a magnetic field. The task involves analyzing six different scenarios depicted in the figures below. --- **Figures and Descriptions:** **Figure (a):** - Description: A vertical magnetic field \( \mathbf{B}_{\text{out}} \) is directed outward from the page, represented by dots. A negative charge moves downward with velocity \( \mathbf{v} \). - Diagram Elements: - Magnetic field (\( \mathbf{B}_{\text{out}} \)) represented by dots. - Velocity (\( \mathbf{v} \)) represented by an arrow pointing downward. - Task: Select the direction of the magnetic force from the dropdown menu provided. **Figure (b):** - Description: A horizontal magnetic field \( \mathbf{B} \) runs left to right. A negative charge moves upward with velocity \( \mathbf{v} \). - Diagram Elements: - Magnetic field (\( \mathbf{B} \)) represented by horizontal arrows pointing to the right. - Velocity (\( \mathbf{v} \)) represented by an upward arrow. - Task: Choose the direction of the magnetic force. **Figure (c):** - Description: A magnetic field \( \mathbf{B}_{\text{in}} \) is directed inward into the page, represented by crosses. A negative charge moves to the right with velocity \( \mathbf{v} \). - Diagram Elements: - Magnetic field (\( \mathbf{B}_{\text{in}} \)) represented by crosses. - Velocity (\( \mathbf{v} \)) represented by a rightward arrow. - Task: Determine the direction of the magnetic force. **Figure (d):** - Description: A horizontal magnetic field \( \mathbf{B} \) runs from left to right. A negative charge moves to the left with velocity \( \mathbf{v} \). - Diagram Elements: - Magnetic field (\( \mathbf{B} \)) represented by rightward arrows. - Velocity (\( \mathbf{v} \)) represented by a leftward arrow. - Task: Select the magnetic force's direction. **Figure (e):** - Description: A vertical
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