63. What is the force on the charge q at the lower-right-hand corner of the square shown here? q a q a a 9

Physics for Scientists and Engineers with Modern Physics
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Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter22: Electric Fields
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### Page 12 of 274

## Problem 63: Electrostatic Force on a Charge in a Square Configuration

**Problem Statement:**
63. What is the force on the charge \( q \) at the lower-right-hand corner of the square shown here?

**Diagram:**
The diagram shows a square with sides of length \( a \). There are four charges, each denoted as \( q \), positioned at the corners of the square. Specifically:
- The charges are located at the upper-right, upper-left, lower-right, and lower-left corners of the square.
- The sides of the square are labeled as \( a \), and the distance between each charge along the sides is \( a \).

\[
\begin{array}{c|c|c}
& & q \\
a & & a \\
& & q \\
\hline
q & & q \\
\end{array}
\]

**Solution:**
The diagonal is \(\sqrt{2}a\) and the components of the force due to the diagonal charge have a factor \(\cos \theta = \frac{1}{\sqrt{2}}\).

### Detailed Explanation:
1. **Identifying Forces:**
   - To find the force on the charge at the lower-right hand corner, consider the contributions from the other three charges.
   - Each charge \( q \) exerts a Coulomb force on the charge at the lower-right hand corner.

2. **Calculating Forces:**
   - **Side Charges:**
     - The force due to the charge directly to the left (at distance \( a \)).
     - The force due to the charge directly above (at distance \( a \)).
   - **Diagonal Charge:**
     - The force due to the charge at the diagonally opposite corner (at distance \( \sqrt{2}a \)).

3. **Components of the Force:**
   - For the diagonal charge, resolve the force into its \( x \)-component and \( y \)-component.
   - The angle between the side and the diagonal is \( 45^\circ \), leading to components along both axes with a factor of \(\cos 45^\circ = \frac{1}{\sqrt{2}}\).

4. **Vector Addition:**
   - Sum the forces vectorially considering the contributions from each charge.

**Summary:**
By calculating the forces from each of the contributing charges and
Transcribed Image Text:### Page 12 of 274 ## Problem 63: Electrostatic Force on a Charge in a Square Configuration **Problem Statement:** 63. What is the force on the charge \( q \) at the lower-right-hand corner of the square shown here? **Diagram:** The diagram shows a square with sides of length \( a \). There are four charges, each denoted as \( q \), positioned at the corners of the square. Specifically: - The charges are located at the upper-right, upper-left, lower-right, and lower-left corners of the square. - The sides of the square are labeled as \( a \), and the distance between each charge along the sides is \( a \). \[ \begin{array}{c|c|c} & & q \\ a & & a \\ & & q \\ \hline q & & q \\ \end{array} \] **Solution:** The diagonal is \(\sqrt{2}a\) and the components of the force due to the diagonal charge have a factor \(\cos \theta = \frac{1}{\sqrt{2}}\). ### Detailed Explanation: 1. **Identifying Forces:** - To find the force on the charge at the lower-right hand corner, consider the contributions from the other three charges. - Each charge \( q \) exerts a Coulomb force on the charge at the lower-right hand corner. 2. **Calculating Forces:** - **Side Charges:** - The force due to the charge directly to the left (at distance \( a \)). - The force due to the charge directly above (at distance \( a \)). - **Diagonal Charge:** - The force due to the charge at the diagonally opposite corner (at distance \( \sqrt{2}a \)). 3. **Components of the Force:** - For the diagonal charge, resolve the force into its \( x \)-component and \( y \)-component. - The angle between the side and the diagonal is \( 45^\circ \), leading to components along both axes with a factor of \(\cos 45^\circ = \frac{1}{\sqrt{2}}\). 4. **Vector Addition:** - Sum the forces vectorially considering the contributions from each charge. **Summary:** By calculating the forces from each of the contributing charges and
OpenStax **University Physics Volume II**

**Unit 2: Electricity and Magnetism**
**Chapter 5: Electric Charges and Fields**

\[ \mathbf{F}_{\text{net}} = \left[ k \frac{q^2}{a^2} + k \frac{q^2}{2a^2} \frac{1}{\sqrt{2}} \right] \hat{i} - \left[ k \frac{q^2}{a^2} + k \frac{q^2}{2a^2} \frac{1}{\sqrt{2}} \right] \hat{j} \]

**64. Point charges** \( q_1 = 10 \, \mu C \) **and** \( q_2 = -30 \, \mu C \) **are fixed at** ...
Transcribed Image Text:OpenStax **University Physics Volume II** **Unit 2: Electricity and Magnetism** **Chapter 5: Electric Charges and Fields** \[ \mathbf{F}_{\text{net}} = \left[ k \frac{q^2}{a^2} + k \frac{q^2}{2a^2} \frac{1}{\sqrt{2}} \right] \hat{i} - \left[ k \frac{q^2}{a^2} + k \frac{q^2}{2a^2} \frac{1}{\sqrt{2}} \right] \hat{j} \] **64. Point charges** \( q_1 = 10 \, \mu C \) **and** \( q_2 = -30 \, \mu C \) **are fixed at** ...
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