Question

The electric field in a region is given by

Answer 1

An electric charge is surrounded by electric field, and exerts force on other charges around it in that field, either attracting or repelling them. Electric fields are typically created  by electric charges, or by time-varying magnetic fields.

• The magnitude of the electric field (E) produced by a point charge with a charge of magnitude q, at distance "r" away from the point charge, is given by the equation $E = kQ/r^{2}$, where k is a constant with a value of $8.99 X 109 N m^{2} /C^{2}$.

• If the charge is positive the direction of the  field produced by the charge would be away from the charge , and towards the charge if the charge is its negative.

• When there are multiple point charges present, as electric field is a vector, the net electric field at any point is the vector sum of the electric fields due to the individual charges.