An electron 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 +4.00 μC/m^2 and ε0= 8.85 x 10^–12 F/m. What is the magnitude of the electron’s initial acceleration if released at distances of a. R from the center of the disk?
b. R/100 from the center of the disk?
c. R/1000 from the center of the disk?
d. Why does the acceleration increase only slightly as the release point is moved closer to the disk?

Explanation:

From the question we are told that

The surface charge density on the disk is

a)Generally the electric field in this situation is given as  is mathematically given as

Generally the Force of release of the electron  is mathematically given as

b)Generally the electric field in R/100 from the center of the disk is given as  is mathematically given as

Generally

Generally the Force of release of the electron  is mathematically given as

c)Generally the electric field in R/1000 from the center of the disk is given as  is mathematically given as

Generally the Force of release of the electron  is mathematically given as

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it