Question

Q. Two point charges +8q and -2q are located at x=0 and x=L respectively. The point on x axis at which net electric field is zero due to these charges is-(i) 8L(ii) 4L(iii) 2 L(iv) L Answer: (iii) 2 L

Q. Which of the following is NOT the property of equipotential surface?(i) They do not cross each other.(ii) The rate of change of potential with distance on them is zero.(iii) For a uniform electric field they are concentric spheres.(iv) They can be imaginary spheres. Answer: (iii) For a uniform electric field they are concentric spheres.