Question

Electric field at x =13 cm​

Answer 1

Answer:

(3) 5 volt/meter

E=-d(V)/dr

derivative is the slope of the line in 13 cm =(20-30)/(14-12)=-5

since E= -(derivative /slope)=-(-5)=5 volt/meter

Answer 2

Answer:

E=5 V/m

Explanation:

E= -dv/dx

|E|= dv/dx=|20-30| / |14-12|

|E|= 10/2=5 V/m