# physics

posted by .

How much work does the electric field do in moving a proton from a point with a potential of +120 V to a point where it is -60 V? Express your answer in joules.

I've looked through my notes, and I'm sure the answer is really easy, but I'm not seeing it.

I know that Work(Wba)= PEa - PEb and that
Electrical Potential Vba = (Vb - Va)/q where q is the charge.

I'm sorry, I think i've just confused myself and I keep trying to relate equations but it's not working.

• physics -

Your notes are wrong on the second equation

Work=Force*distance= Eqd= (Va-Vb) q

The difference in potential is 180volts, q is the charge on an electron.

## Similar Questions

1. ### Physics

1)An electron moved from point A to point B along an equipotential surface. a)the eclectron performs work in moving from point A to point B b)Work is required to move the electron from point A to point B c)Work is both required and …
2. ### physics

How much work is needed to move a proton from a point with a potential of +470 V to a point where it is -51.0 V?
3. ### Physics

A proton is released from rest in a uniform electric field which is directed along the x axis and of magnitude E=2*10exponent5 V/m.The proton undergoes a displacement from point A at the origin to point B at x=0.2m.What is the change …
4. ### physics

A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance …
5. ### physics

A proton moves in a constant electric field E from point A to point B. The magnitude of the electric field is 4.2 x10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance …
6. ### Physics

How much work does the electric field do in moving a 2 μC charge from a point with a potential of +20 V to a point with a potential of −20 V?
7. ### Physics

A point charge Q1=-2 microcoulomb is located at x=0, and a point charge Q2=+8 microcoulomb, is placed at x=-0.5 on the x axis of a cartesian coordinate system.The goal of this problem is to determine the electric field,at various points …