05.20: A portable radio that is playing is placed inside a scree0y ohyl;rc:j5n cage as shown. When inside the c:r c5 0y;ylhjoage the radio stops playing because

  94.21: Which of the following statemetxt ,7qdm l.6snts about solid conductors in electrostatics are true? dsxmt q6.t ,7l
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 char2hgic4s11ml6fl v -ain va*-h ge + Q. Which graph best depicts the electric potential as a function of r, t1mglacvvhf 1s2iin6l ha* 4--he distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has pmm l*-a0675zyl wrogsjj ;lx 9ositive charge + Q. Which graph best depicts the electric field as a6lx 5-0mag9 mlry lws7;*zo jj function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and init 71xr 1l7bzmgoial charge + 6.0 nC and S2 of radiusg7r1om1z b l7x 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and m9w4im0n , jytY, 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 b/mz c(33nmu3av elr8 positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the axis? mz(r8nl3m a3 3ue/cbv

  03.50: A solid uncharged cb dcqgss 1b :rg,+:vc6onducting 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 cb+ :gb c ,dgv1rs:6sqcommon 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 stx p:5ow gn2b-hh(c sw-atic equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potentiahw:-hos- nbpwx5(g 2c l (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 conducting sphere of radius 3a crn kpk;(:lg p(onn..contains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. :onklnk ((g.rpp .cn ;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 rqu.6 8dujb u/26m9jx 7m dqoyuadius 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 su7 qq.8uj mbd 9xmdu/6 ujy2o6urfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell hd0 .s6*k jfvu,)yddrmhtf 44 pas a net charge +Q placed 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 B is at the surface of the sh r v*ut,ph df k4m4dyf0s6.)jdell, 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 sphericsqjz5 :mtv 0c q;x4vd7al conductor 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 statemens v 7mq 5qz0:vjdxc;4tts 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 invb sfbmxf ,k0ebg1ph353 cnh8r- u+0 n free space. The outer shell has inner radius 2a and outer radius 3a. The inner8u3 -xk,1fsp + 0nbevnc3hf gmrh05bb 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
$Q_{i}n$?

  14.35: There are several st6/,oc kq;i 0*zw a bity-4pgstatements presented below that attempt to describe physical phenomena. Which one of the following statements is corrb/k; , gq* as-z4 itwticp6o0yect?