The direction of the electric field in a particular region is indicated by the g
ID: 2163482 • Letter: T
Question
The direction of the electric field in a particular region is indicated by the gray arrows in the diagram. A positive charge enters the region of the electric field at the location A. The green arrow indicates the velocity direction of the charge as it enters the field region.
I cannot get the figure to upload but it is a positive charge being inserted downward into electric field lines facing that are facing downward.
Will the charge speed up or slow down through this region?
What will be the work done by the electric field as the charge moves from A to B?
How will the kinetic energy of the charge change as it moves from A to B?
Explanation / Answer
The force on the charge (ExQ) is in the direction of the electric field since it is a positive charge. However, when moving from B to A, you are moving in a direction perpendicular to the force, therefore the work done is zero. From C to A you will need to work out the distance moved in the x direction work done = force x distance moved in direction of force. Don't forget to change your charge to Coulombs so answer will be in Joules.