Electrons in a Particle Beam Each Have a Kinetic Energy

Multiple Choice

Electrons in a particle beam each have a kinetic energy of 4.0 × 10−¹⁷ J.What is the magnitude of the electric field that will stop these electrons in a distance of 0.3 m? (e = 1.6 × 10−¹⁹ C)

A) 1.9E+3 N/C
B) 7.5E+3 N/C
C) 8.3E+2 N/C
D) 1.3E+3 N/C
E) ​6.3E+3 N/C