Two point charges `q_(A) = 3 mu C` and  `q_(B) = -3 muC` are located  20 cm  apart in vaccum
Channel: Doubtnut
Date: 2020-08-16

Two point charges `q_(A) = 3 mu C` and  `q_(B) = -3 muC` are located  20 cm  apart in vaccum (a) what is the electric field at the mid  point  O of the line  AB joining  the two charges ? (b) If a negative  test charge of magnitude `1.5xx10^(-9) C` is placed  at the point, what is the force  experienced  by the test charge ?