05.20: A portable radio 4nnfmn 9.wyqx5midj-/ sjv2 7 that is playing is placed inside a screen cage as shown. When inside thj2qi7-m5fmj/vdn9wy x4n .ns e cage the radio stops playing because

  94.21: Which of the following statements ab- +vjohn*r gt .kj)lls0vsl*-out solid conductors in electrostaticsn0-l l *+o)rl*. jktvghv-sjs are 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 cond ps/02uy. sw9gtdx+teucting sphere of radius R has positive charge + Q. Which graph best depicts the electric potential as as/p+gstd 0.w9ytx2 eu function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radiusi3yqo/qych -23i0yuu*7g e hy R has positive charge + Q. Which graph best depicts the electric u*hiyg- c 3yh o/327yeuqi0qyfield 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 8 )s aabskoxtb.8q8t5and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nCa .ss bk)t8aq x88b5ot) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different radink 4+xreo5 9hg irpi+b21 4yrwi ($R_x>R_y$) 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 idy/:nhs4w 2ru tentical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electricalyh2uw:t rns/ 4 potential along the axis?

  03.50: A solid uncharged conductingxah31un uhuy,r9)/ e m 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 huue1/yr3,nu hmax) 9 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 conductin0.ic6k ew(ygn g sphere in 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 showe6yc0kwg .(in n 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 conducting sphere of radius 3a contains a hollowed 86r);uhveamh m e )g7tzd*xi* spherical region of radius a. A point charge +Q is pla)h 6t e;hgvmei)rz7m ** xu8daced 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 radi cxpdn.wu, 6f(zw*7edus 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 charge density on the inner and outer surfaces 7dez p,f(w6 nx.udw*c of the shell to be exactly equal?

  05.45: A spherical c pf:qz66gkedo55wz, jonducting shell has a net charge +Q placed on it. Which of the following is the correct relationship for the electric potentio6,qgef kz56d wz5:jpal 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 rpu8b6 e 9ecwtdgh 90v 6w5pd;wadius R. It is surrounded by a solid spheripwed9btpvegw5 06 89d 6uwh; ccal 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 − δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentric charged cond-p 7bh zil3by,ucting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electri7,3pb- hl zybic 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 sevr4dgxf.bjkw;ho wak9vwjg-8 5 k:o54 eral statements presented below that attempt to describe physical phenomena. Which one of the following statekfgjw4;rbwav k5d . w4gjkoxh 985-o:ments is correct?