- #1
vf_one
- 14
- 0
Hi I'm having difficulty understanding why the solution for the answer to the following problem is worked out this way.
Three spheres are placed at fixed points along the x axis, whose positive direction points towards the right.
Sphere A is at x=47cm with a charge of 5x10-6C
Sphere B is at x=50cm wtih a charge of -5x10-6C
Sphere C is at x=54cm with a charge of 10x10-6C
Sphere B is removed. What would be the magnitude of the electric field at the point where sphere B was located?
I've managed to work out the electrostatic force on sphere B using F= kqAqB/r2 and F= kqBqC/r2.
In the answer it says that we use the equation E=FB/qB. I don't understand why we use the electrostatic force on sphere B and the charge of sphere B to work out the electric field since B is removed and only spheres A and C are left.
Can anyone explain this to me?
Thanks
Three spheres are placed at fixed points along the x axis, whose positive direction points towards the right.
Sphere A is at x=47cm with a charge of 5x10-6C
Sphere B is at x=50cm wtih a charge of -5x10-6C
Sphere C is at x=54cm with a charge of 10x10-6C
Sphere B is removed. What would be the magnitude of the electric field at the point where sphere B was located?
I've managed to work out the electrostatic force on sphere B using F= kqAqB/r2 and F= kqBqC/r2.
In the answer it says that we use the equation E=FB/qB. I don't understand why we use the electrostatic force on sphere B and the charge of sphere B to work out the electric field since B is removed and only spheres A and C are left.
Can anyone explain this to me?
Thanks