Question

Two 10-cm-diameter charged disks face each other, 20 cm apart. The left disk is charged to - 50 nC and the right disk is charged to + 50 nC .

Part A

What is the electric field E⃗ , both magnitude and direction, at the midpoint between the two disks?

Express your answer using two significant figures.

Part B

To the left disk.

To the right disk.

Parallel to the plane of the disks.

SubmitRequest Answer

Part C

What is the force F⃗  on a -1.0 nC charge placed at the midpoint?

Express your answer using two significant figures.

Part D

To the left disk.

To the right disk.

Parallel to the plane of the disks.

Answer 1

Electric field at a distance from the disk of radius is

(Charge density )

Distance of mid point to each disk    

Radius of disk

Charge on each disk

Part A)

Electric field at the mid point between the charges due to left charge

and is directed left.

Electric field at the mid point between the charges due to right charge is

and is directed left.

  

Magnitude of net electric field at the mid point between the two disks is  

Part B) Direction is  To the left disk

Part C)

Force on is

Magnitude of force is

Part D)

Direction is to the right.