An infinite line of charge with linear density λ1 = 7.7 μC/m is positioned along the axis of a thick insulating shell of inner radius a = 2.5 cm and outer radius b = 4.4 cm. The insulating shell is uniformly charged with a volume density of ρ = -696.0 μC/m3.
1. What is λ2, the linear charge density of the insulating shell?
2. What is Ex(P), the value of the x-component of the electric field at point P, located a distance 6.8 cm along the y-axis from the line of charge?