I'm really stuck on Q14 from the PHYA4 section A paper.
I'm self teaching - so any helpful videos you could link me too would be massively helpful, as i really don't think i understand the concepts of electric potential and field lines
The question says that a charged particle moving in an electric field:
A) No work is done when the particle moves along a field line
B) No force acts on a charged particle when it moves along a field line
C) No work is done when a charged particle moves along a line of constant potential
D) No force acts on a charged particle when it moves along a line of constant potential.
The answer is C, is this because the electric potential difference accelerates the particle along the line?
But if work done = Force x distance moved, why is Work Zero? The force acting on the charged particle must be zero which i don't understand as its in an electric field