05.20: A portable radio that is ;hd5k/8i;id kkne:nb playing is placed inside a screen cage as shown. When inside the cage the b hnkni8e5dk; /d;k:iradio stops playing because

  94.21: Which of the following statements about sol4pccf , x8 .5p;gou-rct2h wwnid conductors in electrostatics arert -52nwu xc.ogc,4hw;c pf8p 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 hasdnacr 4ct, ;k( positive charge + Q. Which graph best depicts the electric potential as aadc,n;r(ct k4 function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positq qr(i*pl3cl*qvw / k2ive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of the sphereq3(viwqlcq*rl k */2p?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initial chargelj(. jf,hti18 zgbi)t + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) ar,. t1j j(fl)t ib8izghe connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and v8sstpuyw/4f:* 8tiam8m o4 h 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 charge,sak yc 1fveka955mz6s located at points 4 and 6 on the positive x axis. Which of the following graphs best represent t5,seak9vyz6 c5 1famkhe electrical potential along the axis?

  03.50: A solid uncharged conducyq0511 :xxk o4rnpg 9f2hrr pzting sphere has radius 3a contains a hollowed 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 magnitude of the electric field at the position r = 4a from the center of the sph h0f rprg5xq9zpyk xo 241nr1:eres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolatzdziq/(+di ho-f; o-wed 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 figioqz-(fw+ ;/ oizddh-ure? 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 conducting sphere of radius 35u29xhzt t fwp j:b(.ta contains a hollowed spherical region of radiusz9ht.( fut52xtjwpb : a. A point 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 9llhb2sp7( gq+b k f d7w+lfz:shell has inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess charge of the shell be in order for the cha9s7gl(+7l +zlfp b kdwh:qf2brge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net c7r)c pdsf 5j,fc0f+gm+in-z o harge +Q placed on it. Which of the following is the correct relationship for the electric potential at the points labeled A, B, and C? Pointp -c csjzgr+n05+,idfo )mf 7f 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.x4/eacn1ow fjg b9 b),sf.lfj./y je9 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 c9jl) e,c.9 fy fb1ojfxa4w/g.s/jn eb enter 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 shel4pdglwi*qv(. 67zwgj ls are in free space. The outer shell has inner radig z 7wpj*dlqg.vw4i(6us 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 st dq zc -*kylku)prf55)atements presented below that attempt to describe physical phenomena. Which one of the f5l)cpyk - zf qdkur*)5ollowing statements is correct?