Author Question: A solid non-conducting sphere of radius R carries a uniform charge density. At a radial distance r1 ... (Read 111 times)

Tazate · **on:** Jul 29, 2018

A solid non-conducting sphere of radius R carries a uniform charge density. At a radial distance r1 = R/4 the electric field has a magnitude E0. What is the magnitude of the electric field at a radial distance r2 = 2R?

A)

E0/4
B)

0
C)

E0/2
D)

E0
E)

2E0

Question 2

Consider the potential energy U(x) = (1.0 J/m3)x3 - (8 J/m2)x2 + (15 J/m)x + 8.0 J. Find the turning points of the bound motion when the energy E is 8.0 J.

A)

1.0 m and 7.0 m
B)

3.0 m and 4.0 m
C)

2.0 m and 4.0 m
D)

3.0 m and 5.0 m
E)

1.44 m and 5.56 m