Question

A uniformly charged disk has radius 2.50 cm and carries a total charge of 2.0×10⁻¹² C .

What is the percent difference between the electric fields produced by the finite disk and by a point charge with the same charge at x = 20.0 cm?For this question I got that, E(disk)=.44N/C and that E(point)= .45N/C.

▼ Part E Constants A uniformly charged disk has radius 2.50 cm and carries a total charge of 2.0x10-12 C.(Figure 1) hat is the percent difference between the electric fields produced by the finite dis and by a point charge with the same charge at20.0 cm? Express your answer using one significant figure. Figure く 1of1 Epoint Edlsk SubmitPr Previous Answers Request Answer X Incorrect Try Again; 2 attempts remaining drl

Which gave me a percent error of 2% when I calculated it using E(point)-E(disk)/E(point).

I don't understand why this is wrong.

Any help with work would be appreciated.

Thank you.

There is a similar question following this one asking the same thing except with x=10.0cm, so if someone figures this one out I think that I can do the other one as well based on this one's solution. (The other question wants the percentage to two sig figs)

Answer 1