Question

Two point charges are separated by a distance of 2 metre find the point on the line joining them at which electric field intensity is zero

Answer 1

Answer: 1m

Explanation: q1 = q2 = a

Let x be the distance from q1 and 2-x be the distance from q1.

Kq1/r1^2 = Kq2/r2^2

q/x^2 = q/(2-x)^2

(2-x)^2 = x^2

2-x = x

2x = 2

X = 1m

So 1m distance from q1.

2- x =2-1=1m distance from q1.

Electric field intensity is zero at the middle.