Answer:

Given:

Radius of copper wire (r) = 3 cm = 0.03 m

Length of copper wire (L) = 1.0 m

Charge density (σ) = 12 µC/m² = 12 × 10^-6 C/m²

Formula:

Charge (Q) = σ × A

Area of circle (A) = πr²

Solution:

Area of circle (A) = πr²

= 3.14 × (0.03 m)²

= 0.00282743339 m²

Charge (Q) = σ × A

= (12 × 10^-6 C/m²) × (0.00282743339 m²)

= 0.000033928 C/m × m²

= 0.033928 C

Final Answer:

The total charge present in a 1.0-m long section of the copper wire is 0.033928 Coulombs.