05.20: A portable radio that is playing is placed ins:a gia x n0fya20iny33ide a screen cage as sho faanx g0iyi:yn0a323wn. When inside the cage the radio stops playing because

  94.21: Which of the following statements gys 2y q4z(zs-ju.qd2; fn*ak about solid conductors in electrostatics a-yq z*zdqj 4ngssf2yu2k. ;( 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 jf 1 qm .n4riel;p4qj:w xbrg0/l8o b5of radius R has positive charge + Q. Which graph best depicts the electric potential as a function lmwob1b pqr5r8/lqg 4if04: je ;.njxof r, the distance from the center of the sphere?

  96.36: An isolated conduchxtb51*-ts s 5gs mw)wc59x kjo)qw bl6z,z h;ting sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of the spher5x )6m;b gslw h 5k1wjohzct)x *qtzs9s,b5w -e?

  96.21: Two isolated conductinv8e :mphwqmsdj-/ *a2g spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2amedv*p 8:shm 2 jq/-w.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with different ra wl ang08ra:y;dii ($R_x>R_y$) 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 charf0/i n:uwek d1cq+ c,vges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential alonge v0n/fc, kcw duqi+1: the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed spo0h;m i(s r/xjherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common center ofsji m /0o;(hxr 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 ec win,ph ok. d/1btep b;go 0:gb3xp32quilibrium 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 shown in the interior of the figure? po gb/.k;x1o ,pwb c t2gpnibd3eh 0:3 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, unchargedvy:b,uze2d9a d(p m* 6 pp4glq conducting 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 = 0 as r → ∞ , the z(:dauydg4 ,vle92pb qp6* mppotential at position r =2 a from the center of the spheres is:

  04.50: A solid sphericalua,qf/bl l5--nla )hu ,r p.ow conducting 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 charge density on the inner and outenwu. a5lalqu/) fl, bo--p ,hrr surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on ihrezmum++ami0/ m m;6 t. 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 B is at the surface of the shell, a distance R from point A, and point C is a distance R mam+ez6r mmmi;0u+ h/from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radiu16chc(d :69)ozq owsjgt7xl mf1u uj-s R. It is surrounded by adzj1cto1 -7g6qch:u u6 )xsfw(9 jolm 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 inner sphere.

  15.48: Two concentric charged conducting shells are in fr7lbpt1 i z+h3 ,ube:xxee space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known , xbe h :zu13lixbt7+pthat 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 th db vfpx0qc.s:3 g)o*n9c kc/fat attempt to describe physical phenomena. Which of9 qs:kv0. d*ccn g ocx3)fp/bne of the following statements is correct?