05.20: A portable radio that is playing is placed insidefl12, b 3.s,do,g;xaanflb*eo/ n ewx a screen cage as shown. When inside the cage the radio stops playi*,e3 l;lxnf/e, oan1fds ax,bb.w2go ng because

  94.21: Which of the following statementjd p;sdfa u+zyy0md5m 9 fat0ca61*i 6u wj;:ts about solid conductors in electrostatics arewfm0 f5m6cudua0az* :;ayj;d1i9yp6jtt d+ s 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 conducting sphere of radius R has positive charge + Q.bwdj);o-n6wlhr3f nt)2tbsg- h /is 5 Which graph best depictsg wt;)t nndb5 his/ 3fs26 l--bj)whor the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius pvuw2vky/s0..9i 5s pfs*a+ nr1fevsR has positive charge + Q. Which graph bev+0 skysuve.fs5/s ir9n*.2f v1p wapst depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initl k1 e90s8vks /qvyxkx(/dvz. ial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Cxkk v/ . /9(8devvslqy0zkxs1harge will flow in the wire until:

  17.46 Two copper spheres X aa e8m1mbz-jrt1i)+d *x fqs ;znd 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 positive char gysme+ n70xi4ges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the yxm 0+g 7e4niselectrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a ho7wuyuym7 t 1wve6u)q4llowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from thevq w wy1 e)tymu46u7u7 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 stata50m,cjizq ,nic equilibrium is isolated in deep space with a n n5imz,c,j0a qet 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 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 con2-awb +9q . ky xuhq47snkyy.rducting sphere of radius 3a contains a hollowed spherical region of radius a. A point chq y7w+. x uq.arb29yyksnh4k-arge +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 radioa pm7cadg5(4us 2a. At the7gc p 4daamo(5 center of the 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 a net on o8j,6;cisxcharge +Q placed on it. Which of the followioj68in, os;cx ng is the correct relationship for the electric 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 charge +Q and radius R. It is5l:kr 7,wer ;i30hmxk5+ ivixwf 5rmh surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3Rkx3r, ivixh5 f;mh kr7wme0 r+5:il5w. 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 charos)s z92zds- ;xps ap,ged conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner sx)p ,9o2 s-ps;z zssadhell 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 tha z 9k:kfrh +dw8c2bu)lt attempt to describe physical phenomenaf8z:k9w h)d+lru c2b k. Which one of the following statements is correct?