A straight, nonconducting plastic wire 9.50cm ^{\rm cm} long carries a charge density of 125nC/m ^{\rm nC/m} distributed uniformly along its length. It is lying on a horizontal tabletop.A) Find the magnitude and direction of the electric field this wire produces at a point 5.50 {\rm cm} directly above its midpoint.B) If the wire is now bent into a circle lying flat on the table, find the magnitude and direction of the electric field it produces at a point 5.50cm ^{\rm cm} directly above its center.
