**Text Explanation:**The figure shows a section of a long, thin-walled metal tube of radius \( R = 7.22 \, \text{cm} \), with a charge per unit length \( \lambda = 0.917 \times 10^{-8} \, \text{C/m} \). What is the magnitude \( E \) of the electric field at radial distance (a) \( r = 3.10 \, \text{cm} \) and (b) \( r = 11.8 \, \text{cm} \).**Diagram Explanation:**The diagram depicts a cylindrical section of a metal tube. The tube is represented as a hollow cylinder characterized by radius \( R \). The surface of the cylinder is uniformly covered with positive charges, indicated by plus signs. This visualization helps in understanding the distribution of electric field lines around and inside the cylindrical structure due to charge per unit length \( \lambda \). The diagram assists in visualizing the problem to calculate the electric field at different radial distances from the center of the tube.

(a) Given: A long, thin-walled tube is of radius 7.22 cm. The charge per unit length of the tube is…

Answered: The figure shows a section of a long,…

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The figure shows a section of a long, thin-walled metal tube of radius R = 7.22 cm, with a charge per unit length A = 0.917 x 108 C/m. What is the magnitude E of the electric field at radial distance (a) r = 3.10 cm and (b) r = 11.8 cm. R.