Two large, parallel conducting plates are separated by 3.0 cm. The left plate is at a potential of 45 V relative to the right plate. Assuming the field between the plates is uniform, what is the magnitude of the electric field in the region between them?
a) 7.5×102V/m
b) 1.5×103V/m
c) 1.5×102V/m
d) 4.5×103V/m