Two equal positive point charges are separated by a distance 2a. A point test charge is
Channel: Doubtnut
Date: 2020-08-23

Two equal positive point charges are separated by a distance 2a. A point test charge is located in a plane which is normal to the line joining these charges and midway between them.   (a) Calculate the radius r of the circle of symmetry in this plane for which the force on the test charge has a maximum value.    (b) What is the direction of this force, assuming a positive test charge ?  [at `sqrt(2)`, radial and away from the center]