1. In the figure below, equipotential surfaces are shown along the z-axis. The surfaces are equally spaced with V=100 V at z = 0.00 m, V=200 V at z = 0.50 m, and V=300 V at z = 1.00 m. X 100V [200 V 300 V 0.50 m 1.00 m y (a) What is the magnitude of the electric field in this region? V E = m (b) What is the direction of the electric field? +z direction -z direction

The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 x 10-30 C.m. Calculate the electric potential in volts due to an ammonia molecule at a point 56.2 nm away along the axis of the dipole. (Set V = 0 at infinity.) Number i Units

The figure below shows the equipotential surfaces of an electric dipole in the xy-plane. The x and y scales are in units of meter. The charge on the left is positive. Each color change represents a a change in the potential of 5 V. Estimate the magnitude and direction of the electric field in units of V/m N/C at x 13.5 m, y = 13.5 m. = 24.5 22.5 20.5 18.5 16.5 14.5 12.5 10.5 8.5 6.5 4.5 2.5 0.5 0.5 2.5 4.5 6.5 8.5 10.5 12.5 14.5 16.5 18.5 20.5 22.5 24.5