일반물리학 2 — Electric Fields: Problem 58

58 In Fig. 22-49, an electron (e) is to be released from rest on the central axis of a uniformly charged disk of radius R. The surface charge density on the disk is \( 5.00 \text{ \mu C/m}^2 \). What is the magnitude of the electron’s initial acceleration if it is released at a distance (a) R, (b) R/100, and (c) R/1000 from the center of the disk? (d) Why does the acceleration magnitude increase only slightly as the release point is moved closer to the disk?