Question

two charges of value 2uc and -50 are placed 80cm apart calculate the distance of the point from charge where the intensity is 0

Answer 1

Two point charges 2uC and 8uC are placed 12 cm apart. Find the position of the point where electric field resultant will be zero

Damon Tuesday, March 8, 2016 at 2:10pm2/x^2 = 8/(12-x)^2 

1/x^2 = 4 /(12-x)^2 

4 x^2 = 144 - 24 x + x^2 

3 x^2 + 24 x - 144 = 0 

x^2 + 8 x - 48 = 0 

(x+12)(x-4) = 0 

x = 4 cm 
then 12 - x = 8 cm 


check 
2/16 = 8/64 ??? yes right