Apoint charge with charge q1 = 4.00 μc is held stationary at the origin. a second point charge with charge q2 = -4.40 μc moves from the point ( 0.155 m , 0) to the point ( 0.245 m , 0.270 m ). how much work w is done by the electric force on the moving point charge?

W=0.94J

Explanation:

Electrostatic potential energy is the energy that results from the position of a charge in an electric field. Therefore, the work done to move a charge from point 1 to point 2 will be the change in electrostatic potential energy between point 1 and point 2.

This energy is given by:

So, the work done to move the chargue is:

The work is positive since the potential energy in 1 is greater than 2.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.