Question

Expression for electric field intensity due to pt. Charge

Answer 1

Answer:

Electric field due to point charge = kq/r²

Explanation:

We know that,

F = qE that is,

Force = Charge × Electric field

Therefore,

Electric field = Force / Charge

We know that,

Force = 1 / 4πε₀ q₁q₂/r²

Force = k q₁q₂/r²

Hence the field due to q₁ at q₂ will be,

Electric field = Force / Charge

Electric field = 1 / 4πε₀ q₁q₂/r²   * 1/q₂

                     =  k q₁q₂/r²  * 1/q₂

                     = kq₁ / r²

                     = kq / r²