Question

30.0 p. J of energy is stored in a 1.50 cm times 1.50 cm times 1.50 cm region of uniform electric field. What is the electric field strength? Express your answer with the appropriate units.

Answer 1

Energy stored per unit volume in electric field is U = 1/2 epsilon_0 E^2 U = energy E rightarrow Electric field, Given U = 30 PJ = 30 times 10^-12 J E = (2 U/epsilon_0) = (2 times 30 times 10^-12)^1/2 E = 2.6 N/C The electric field strength is E = 2.6 N/C