Question

calculate the electric field intensity at a point distance 4 meter from a charge of 16 micro coulomb.​

Answer 1

Answer:

We have to search for the null point where the resultant field is zero. Since the two point charges are of similar nature (both positive), there cannot be a null point on the line lying either left of point A or right of point B as in these regions the individual fields produced by the charges are parallel and hence cannot nullify each other. However there is a possibility of null point between the points A and B. Let P be that point (lying at a distance x from point A).

At point P,

Therefore, the resultant electrostatic field is zero at a point (on the line joining the two charges) lying 2m right of the charge 16 μC or 1m left of the charge 4μC.