05.20: A portable radio that is pt1vw.:l rdu -glaying is placed inside a screen cage as shown. When inside the cage the radio vw1d .-glur t: stops playing because

  94.21: Which of the following state *6g7ln i/fb o30bv.;iwmuvbmments about solid conductors in electrostatics ib;u03f6 b/ vbl iv7.nmmgo w*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 conducting sphere of radius R has positq.g 71 dwnhhn7icwp28ive charge + Q. Which grq78wn.chw igd1 7h2pnaph best depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R1mx;avq+sx z ) q2 kt.-uwq*w1 : )zwh.xsitiy has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance f s.w21)qwk1s.iamhxx )y: i qxzz*-u;+twvtq rom the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radef50k5zj 5. -jqafi.2 emp7 udii5hmnius 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 conducti-mjumnpfie h7 i5dfeq.5z5 .25ijka0ng wire. Charge will flow in the wire until:

  17.46 Two copper spherftcmt18dp(1o5 s :n gpes 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 shows two identical positive)o2 l7/4tjmflqd n 9 ,lweqdw(-fdym0 charges located at points 4 and 6 on the positive x axis. Whicd w9tf7(l) yjd 20lmqq/eol 4,-w fmdnh of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conductinef1upav+y -i*mpg9j 7qhcl9 +g 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 sphere gp q9hl+7v19a-iyf euc+m*jps. 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 isolap .w) jf5ifk)svzfsst ,h8( v1ted in deep space with a net excess ck )wisv58v1 .zf)p,fsh ( tjfsharge +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 con zw,/fgwddn m)p*fk /-ducting 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 fd d* )znw,kf/-wp/gmV = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shelm8.mljfty1mwu - n 1:sl 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 charge density on the inner and outer surfaces of the shel 1fs1-t.8lmmuwm ny:jl to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q pla s/+; qcj8bi(enrs2ijced on it. Which of the following 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 B2r; ( injebc8s/i+sjq 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 conduct m* w:k3sqggccq 4bd28or has charge +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 − δwhere δ is an infinitesimal amount and all distances are from the center of the 8 qmwgd43ks cc*bq:g2 inner sphere.

  15.48: Two concentric charged conducn*,ei( 8fu eaiting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The ine,8i fn ie(u*aner 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 wa6e/j* * b bb 1)fgjneuud r):z5qve+attempt to describe physical phenomena. Which one of the followingejeu*:bq6 fa)bzje nwg/1 )r+d*5 bvu statements is correct?