A uniformly charged disk with radius R = 25.0 cm and uniform charge density o = 7.40 x 10-3 C/m2 lies in the xy-plane, with its center at the origin. What is the electric field (in MN/C) due to the charged disk at the following locations? (a) z = 5.00 cm MN/C (b) z = 10.0 cm MN/C (c) z = 50.0 cm MN/C (d) z = 200 cm MN/C

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### Electric Field Due to a Uniformly Charged Disk

A uniformly charged disk with radius \( R = 25.0 \) cm and uniform charge density \( \sigma = 7.40 \times 10^{-3} \) C/m\(^2\) lies in the \( xy \)-plane, with its center at the origin. This problem explores finding the electric field (in MN/C) due to the charged disk at various distances \( z \) along the \( z \)-axis.

#### Given:
- **Radius of the disk:** \( R = 25.0 \) cm
- **Charge density:** \( \sigma = 7.40 \times 10^{-3} \) C/m\(^2\)

#### Problem:
What is the electric field (in MN/C) due to the charged disk at the following locations?

**(a) \( z = 5.00 \) cm**

\[ \boxed{} \text{ MN/C} \]

**(b) \( z = 10.0 \) cm**

\[ \boxed{} \text{ MN/C} \]

**(c) \( z = 50.0 \) cm**

\[ \boxed{} \text{ MN/C} \]

**(d) \( z = 200 \) cm**

\[ \boxed{} \text{ MN/C} \]

### Explanation
- **Radius \( R \) and charge density \( \sigma \)** are constants for the disk.
- The electric field \( E \) at a distance \( z \) from the center of the disk, along the perpendicular axis, is what needs to be calculated.
- The mentioned locations \( z \) are measured along the \( z \)-axis from the plane of the disk.

### Steps to Calculate the Electric Field
1. **Find the exact expression for the electric field** due to a uniformly charged disk at a point on the axis perpendicular to the disk through its center.
  
   The general formula for the electric field at a distance \( z \) from the center of a uniformly charged disk is given by:

   \[
   E(z) = \frac{\sigma}{2 \epsilon_0} \left(1 - \frac{z}{\sqrt{z^2 + R^2}}\right)
   \]

   Where:
   - \( \epsilon_0 \) is the permittivity of free space (\(
Transcribed Image Text:### Electric Field Due to a Uniformly Charged Disk A uniformly charged disk with radius \( R = 25.0 \) cm and uniform charge density \( \sigma = 7.40 \times 10^{-3} \) C/m\(^2\) lies in the \( xy \)-plane, with its center at the origin. This problem explores finding the electric field (in MN/C) due to the charged disk at various distances \( z \) along the \( z \)-axis. #### Given: - **Radius of the disk:** \( R = 25.0 \) cm - **Charge density:** \( \sigma = 7.40 \times 10^{-3} \) C/m\(^2\) #### Problem: What is the electric field (in MN/C) due to the charged disk at the following locations? **(a) \( z = 5.00 \) cm** \[ \boxed{} \text{ MN/C} \] **(b) \( z = 10.0 \) cm** \[ \boxed{} \text{ MN/C} \] **(c) \( z = 50.0 \) cm** \[ \boxed{} \text{ MN/C} \] **(d) \( z = 200 \) cm** \[ \boxed{} \text{ MN/C} \] ### Explanation - **Radius \( R \) and charge density \( \sigma \)** are constants for the disk. - The electric field \( E \) at a distance \( z \) from the center of the disk, along the perpendicular axis, is what needs to be calculated. - The mentioned locations \( z \) are measured along the \( z \)-axis from the plane of the disk. ### Steps to Calculate the Electric Field 1. **Find the exact expression for the electric field** due to a uniformly charged disk at a point on the axis perpendicular to the disk through its center. The general formula for the electric field at a distance \( z \) from the center of a uniformly charged disk is given by: \[ E(z) = \frac{\sigma}{2 \epsilon_0} \left(1 - \frac{z}{\sqrt{z^2 + R^2}}\right) \] Where: - \( \epsilon_0 \) is the permittivity of free space (\(
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