the electric field srength E due to an infinite line of chargeis given by E = λ/(2πrεo),
where λ is the charge per unit length and r is the radial distance from the wire.
a, show that this formular for E still has the units of N/C.
B,what is the attractive force on a charge q1 of 1μC when 1mm from the line of charge if λ= nC/m?