Question

Electric field at point p(2m,1m,2m) due to a point charge 5.0 muC placed at origin is

Answer 1

Find the distance squared from the origin to the point:

$$D^2={2^2+1^2+2^2}=9\text{ m}^2.$$

The field at this point:

$$E=\frac{kQ}{D^2}=4993\text{ V/m}.$$