Basic electrostatics's potential difference question.

[vkash]

Homework Statement

true false

Work done by external forces in moving a unit positive charge from A at potential V_a to B at potential V_b is V_b-V_a

Homework Equations

basic electrostatics.

The Attempt at a Solution

dW -F.dr=-Dw
if a unit charge move from V_a to V_b then change in potential energy will V_b-V_a. So dV=V_b-V_a so dW=V_a-V_b

 

[Spinnor]

Sometimes it might help to throw in some numbers. Let Va be 1 volt and let Vb be 2 volts. If we are moving the positive charge from a to b then we are doing work, so it looks like the answer is true?

 

[vkash]

Sometimes it might help to throw in some numbers. Let Va be 1 volt and let Vb be 2 volts. If we are moving the positive charge from a to b then we are doing work, so it looks like the answer is true?

Can you please explain it with proper variable and formulas.