05.20: A portable radio that is playing is placed inside a screen cage xz:a dex.uy*e cux( :8sh x f.1orj)h0as shown. When inside the cage the radio stops playing becaayjse0ecf hh ux*xx u.o:xz (d8r: ).1use

  94.21: Which of the following statements abouul93khaw6bv5r9 *;h5pn8 t, tuq gho)sb cla;t solid conductors in electrostatics are true? akthh5u;h9ll; t5crg up)* obsn a3q9,bv6w8
I. The electric field inside the conductor is always zero.
II. The electric potential inside the conductor is always zero.
III. Any net charge is on the surface.

  95.07: An isolated conducting sphere of radius R has positive nbc/;ylqgn*0mmef8 , 4cax: +e5jgk l charge + Q. Which graph best depicts the electric potential as a functi ea+:8f0qgcx5nk el,lm 4yc */g;nmb jon of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphe-jh+8yr ghd; ore of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from ty8r+d ;hojhg-he center of the sphere?

  96.21: Two isolated condapyhmc7.5sc9; jgasm.l j ,3 eucting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC3 apcsmjl5.e y, sjgamc.h9; 7) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper sphe .q vfgizf/.a8t4jm:hres X and Y, with different radii ($R_x>R_y$) and equal excess charge +Q, are placed apart from each other. A scientist using insulating gloves connects the spheres with a copper wire. Which one of the following choices best describes what happens after the connection is made?

  03.43: The diagram s 29 7jz/qzwhkdhows two identical positive charges located at points 4 and 6 on the positive x axis wqzdzj9 7k2/h. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollo8gze:b7b79tw h nhyn9wed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common center of the spheres. What is the magnithb g9 n9wyht7n8eb: z7ude of the electric field at the position r = 4a from the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in *-c)i+gmvjca.x bfv . static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at the position labeled P shown in the interior of the figure? The sphere has radius R=3a and the point of interest is at aa xb+gv v)f..icjmc-* location r=2a from the center of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conducting sphere of radius 3a contains a hollowed sf- 6)u;wo9nf5iohlukpherical region of radius a. A pof9of;-i6 ln o5h ku)uwint charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer radiarcja99 3n rs)us 2a. At the center of the shell is located a point charge +Q. What must the)3rc 9anrj9s a excess charge of the shell be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a nenk xf 9)sb r4oya.3l6ga7.mput charge +Q placed on it. Which of the following is the correct relationship for the electric potential at the rfny 3lma7o u.asg.9x46pb) k points labeled A, B, and C? Point A is at the center of the sphere, point B is at the surface of the shell, a distance R from point A, and point C is a distance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical rq1zas9 f// ssconductor has charge +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner radius 2R, and oute/r sz9s aq/f1sr radius 3R. Which of the following statements is true for the labeled points in the diagram? Assume these objects are isolated in space and that the electric potential is zero as the distance from the spheres approaches infinity. Point A is at the center of the inner sphere, Point B is located atr= R + δ, Point D islocated atr =3R+ δand Point C is located at r =2R − δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged conducting shells are in fr;*rmex o y7n5pee space. The outer shell hy;e 7nx*r5mop as inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric potential at $r=3a$ is $V_{3a}=\frac{kQ}{3a}$ . If the electric potential $V_a$ at $r=a$ is 0 volts, what is the charge on the inner spherical shell
$Q_in$?

  14.35: There are several s)gj,fx kq:* 1mex 4wjwtatements presented below that attempt to describe physical phenomena. Which one of the fo xfgjjxwq,m *4wk):e 1llowing statements is correct?