A point charge of 5 C is located at point A between two plates 40 cm apart. The potential of the upper plate is 1000 V and the lower plate is at zero. The geometry of the situation: Side next to 1000 V plate between A and C is 40 cm. Right-angled triangle. From A to opposite B is 30 cm. Longest 50 cm is between B and C , opposite to right angle.

Calculate the force on the charge when it is at A.

Calculate the force on the charge when it is moved to position B. (30 cm towards lower plate)

Calculate the energy that is expended in moving the charge from point A to point B.

Calculate the energy that is expended in moving the charge from point A to point C. (40 cm)

What is the net energy change if the charge is taken around the loop from A to B, then to C and back to A.