Apoint charge with charge q1 is held stationary at the origin. a second point charge with charge q2 moves from the point (x1, 0) to the point (x2, y2). use k for coulomb's constant rather than writing it out as (1/4πϵ0).

how much work w is done by the electrostatic force on the moving point charge?

Explanation:

Position of charge q₁ is (0,0)

Position of charge q₂ is (x₁,0)

So, the electric potential energy between the charges is given by :

Now the position of charge q₂ has been changes from (x₁,0) to (x₂,y₂). Now, electric potential energy between the charges is :

We know form the work energy theorem that, the change in potential energy is equal to the work done. Mathematically, it is given by :

Hence, the work done by the electrostatic force on the moving point charge is . Hence, this is the required solution.

asthenosphere and convection

the answer is b i think