- Radius of the disk, \( R = 6.51 \, \text{cm} = 0.0651 \, \text{m} \)
- Surface charge density, \( \sigma = 3.11 \times 10^{-6} \, \text{C/m}^2 \)
- Point \( P \) on the x-axis, \( x = 1.19 \, \text{cm} = 0.0119 \, \text{m} \)
- Coulomb's constant, \( k =
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