Question

In lab tests it was found that rats can detect electric fields of about 5.07 kN/C or more. If a point charge of 1.24 μC is sitting in a maze, how close must the rat come to the charge in order to detect it?

Answer 1

E= KQ/r2

E= 5.07E3 N/C
K= 8.99E9
Q= 1.24E-6
solve for R