05.20: A portable radio that is playing is placed inside a screenjdi4;fl rj v1193 m1c tl,dkca cage as shown. When lf jd ;tc14k cma1l91ir,vj3d inside the cage the radio stops playing because

  94.21: Which of the folltu exszw7 ,-vx74uc*uowing statements about solid conductors in electrostatics are true?uez7u tw 4v,xxus7-c*
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 charge + Q. tyu5i d0/kend2 vo7.c Which graph best depicts thuti 2nke5 oy0d/7dc.ve electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radiu7 . 6icxvowex.m;zub) s R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center of thuw7 )mvoi6zx. .c;x bee sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030yelg*i7p ;8uarv *u cq 9n0 atxlr.6)q m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire.ny7qr80t6 lql.*r9xue ga;p)vi* u ca Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with differehxc-wb(ldj71* pgo;q nt 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 pfyyh5k 4d6( vgdtm,8 lositive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along 8 yfylhtg6d,m 4k5dv(the axis?

  03.50: A solid unchanu k,5zmmig(r2xw of42r6r y lq/a/g.rged conducting 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 c2//yi24aurno .w ,mzlr 6rkq(gg 5xfmommon 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 static equilibriv* j( sv 82*,eim ;*sc3avb d)x;)walt xgdswrum 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? The wia3sl2 ds ;ja(gm* ,ew)*xs vxct8;vv )brd*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, unch s-e*zcu3( u5vpjxgj,arged conducting sphere of radius 3a contains a hollowed spherical region of radius a.3xpz u-e ,j(5vcg js*u 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 spherib2jgce oiil,g( (u0i ;wm z7oc5bl97ocal conducting shell has inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must thmo,c2 b ;c (biu(9 giwjozo77ll0i g5ee excess charge of the shell be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it. Whichv45,ue9 e q tilu:s/qd of t /q5iu4,etd l es9uq:vhe 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 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. 1f 0a1gd5inieg8k 2aoIt 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 zer0g8idnik5g 1af 1a2eoo 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 conductinnc-hu wd :c2vf* *vx2vg shells are in free space. The outer shell has inner radius 2a andx-v2ch:w fv*2 c*nu vd 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 swt6 wyb1 kj/rx.r2+bbelow that attempt to describe physical phenomena. Which one of the following statements is corkwj1y. 2bb+rs6/xtr wrect?