05.20: A portable radio that is playing is placed inside a scr6m1rn,5j *:powco se ifu(9breen cage as shownos5(*91wfmpbi,e r6cj r uo:n. When inside the cage the radio stops playing because

  94.21: Which of the folmr t c:*vmvq;r1*054l mjkfqhlowing statements about solid conductors in electrostatics arevmcvhq* 0l:;*rqkm1t5m 4frj 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 spherev op 6h e/dnv,/9drm3gju8b5 y of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center68,eg9b op jvvmr/3nyu 5hd/d of the sphere?

  96.36: An isolated cond6fyhr:c.9j :sv gx7zui2hb v9ucting sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance frob9r:isfyjxg z.7 6vh2h:cvu 9m the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of y r+4l)mkt wwa-m 3+ikradius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m any tm3ia+4mkw+ wrkl)- d initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper sphg-h x 2x cyo0lr9q0od2eres 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 charges locate tfav nmmg)g,7 (po1y3d at points 4 and 6 on the positive x axis. Which of the following graphs best representfp ga,m)vyong t713m( the electrical potential along the axis?

  03.50: A solid uncharged conducting lp1m+7err1ivmdbj p30v e4gdeb 4w:ogx ;)v0sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is placed at4vege:ip4rl1)0 wxejmb ;bd3d0o mgpv7+ v1r 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 spheres as marked in the figure by P?

  11.46: A hollow conducting im qw d80y/1sjcl6vm0gu p*2v d1bz 3jsphere 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 shown in the ic vpsq821ji 6glu3vj dm00y /db mw*z1nterior 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 o5c 9y )6wy)bw- qayqa8fqbnr7f radius 3a contains a hollowed spherical region of y)bc7wf-w qaqyynqbr5 86 9 a)radius 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 shelou s0sv*,cmo 7l 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 v,os*s ou7c0m the shell to be exactly equal?

  05.45: A spherical conducting shell has a ne4 ( 5s yv8 ,p,y1azuuup)oj0cxy:o myxt charge +Q placed on it. Which of the following is the correct relationship for the electric potential at the points labeled A, Boz4jm:c5 s0 , 1u8p,uyxoa) uxpyyyv(, 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 radius R. It i84e / sg;kl h (zo7ujf q)drlj/l:s3fus surrounded by a solid spherical shell with charge − Q, inner radius 2R, and oute8fs/qr )uls; 4zogd3:jkh / ef7(jlulr 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 free i))ohbj.tj r 3space. The outer shell has inner radius 2a 3.j))rtio jhb 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 statements presented below thai6 hv 9lec4:mbra 8v;ft attempt to describe physical phenomena. Which one of the following statements is corb vc986vhm;4 e :lirafrect?