05.20: A portable radio that is playing is placed inside+ku/:b;xa,tmvr3svg*(4x +z 4xbqgdp9 w s rw a screen cage as shown. When inside the cage the radio stops pl; wmkbx vu3sbw4a9*,grg/+pd+ z4 xrxs v :(tqaying because

  94.21: Which of the following statements about solid conductors in el9ytf- qs*n. w dgncxm9lvfnb00yj532 w );i voectrostatics aw9msyv g)3vdjlc0-b t 9f5*n q;0nynw2ixfo. re true?
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 conclqbnn n5xz13 w5t;+exj,q9 nducting sphere of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance fro1b jn5w etqq5xn n93,+zc; xlnm the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Q. Whic to 2y-qu6qc5sh graph best depicts the electric field as a function of r, the distance from the center of the sphes 62y- coqtq5ure?

  96.21: Two isolated conductp0ik0rebt 91c +:i5*wmybuojing 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 nC) are connected by a conduc jir0 b0tibmwc5yo*:u9 k ep1+ting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X gu gyf (5)p6 sk-xpfd3and 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 shows two identical posiu4q6f 5 +gr;ki n.eocnryae5a 7k )-dative charges located at points 4 and 6 on the positive x axis. Which of the following graphs best - 5eag 5k ieyq7nud ck.rfrao4+;6n)arepresent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a ho1a ztaw1- tf7 /dbqsf4llowed spherical region of radius 2a. A point charge +Q iswaf11bs/ 7- tdtafz4q placed at a position a distance a from the common center of the spheres. What is the magnitude 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 static equilibrium is isolated in d31 klu6az7dpum 2m *gieep 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 hm gz7ua36*u dpkl1i2mas radius R=3a and the point of interest is at a 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 conductin,90fzl y): y3+n2udxos .hkc vg prvm7o-qj) pg sphere of radius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V =pd:yqsujyonzoh 97-mcr 0g.kl32 + ,vx ) fp)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 outerxsd ri* 5d -u 36jgbz.y9jvja- radius 2a. At the center of t dvua.g9r3-idx j 5bj6syz j-*he shell is located a point charge +Q. What must the 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 ainavea g c+k(*nlwo3 08 8xcq) net charge +Q placed on it. Which of the following is the correct relationship for the c ni*g al0(nckxvq8w)3o+e8 aelectric potential at the 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 conductor has chargp78mdt zt3zbyt -wtv 5n5sl 39e +Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer 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 pt 5 vlz5n-9t8tw7 z s3y3mdtb− δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged co tg/*(bfx pgw5w;ype0muh) 2 inducting shells are in free space. The outer shell has inner radius 2a andt5 pwg p; (fwx)iebmh*gu2/ y0 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 statements presented below that attemp(/bifzn )5 arlt to describe physical phenomena. Which one of the folloil5z() bnfr /awing statements is correct?