The surface charge density on a conductor is 1.55 x 10-9C/m2. The conductor is immersed in water with ε = 78ε0.The electric field will be __________ .-A-3 V/mB-1.55 V/mC-2 V/mD-2.25 V/m-D-2.25 V/m

D 2.25 V/m D = εE = 78ε0E ∴ E = 2.25 V/m.