Question

A uniformly charged disk of radius 35.0 cm carries charge with a density of 7.90 × 10^23 C/m^2. Calculate the electric field on the axis of the disk at:

a. 5.00 cm
b. 10.0 cm
c. 50.0 cm
d. 200 cm from the center of the disk.

Answer 1

To calculate the electric field on the axis of the disk at different distances, use the formula for the electric field due to a uniformly charged disk.

The correct option is:

c. 50.0 cm

Step-by-step explanation:

To calculate the electric field on the axis of the disk at different distances, we can use the formula for the electric field due to a uniformly charged disk:

E = (k * σ/2ε0) * (1 / sqrt(1 + (z / R)2)),

1. For a distance of 5.00 cm, substitute the values into the formula to calculate the electric field.
2. Repeat the calculation for a distance of 10.0 cm.
3. Again, repeat the calculation for a distance of 50.0 cm.
4. Finally, repeat the calculation for a distance of 200 cm.
5. The correct option is:
6. c. 50.0 cm