05.20: A portable radio that is playing is placed inside a screjcnq np 9+,.xten cage as shown. txp.c9+jqnn, When inside the cage the radio stops playing because

  94.21: Which of the following statements about si-,zry i-72qo.cicemq,1b wgr2d* ln olid conductors in electrostatics -q,* cbn gyqrd ce.-z2m ii wo,127lriare 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 positive charge + Q. Whi plz(w n6f3bdebv8y p26j36g kch graph best depicts the electric potent62bp d(6bewlz3g jv yp86fnk3ial as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has pomrkrd-t y3 :db1tq(: fuia-4rsitive charge + Q. Which graph best depicts the electric field as a function of r, the distance -radk3t4i:fu dt:m -(qbry 1rfrom the center of the sphere?

  96.21: Two isolated conducting spheres: yp4n7s4uy yx76+k5 ig gjqus (S1 of radius 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 conducting wire. Charge will flow in tp gsn ys7ugyu:xj 457i 6+4qkyhe wire until:

  17.46 Two copper spheres X and Y, with da(gug1 -rrds)f -q/buifferent 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 idewkm7+: t-af. w:)j z*x ehdbyentical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical poten*f wwbh.)+ad:jey z x-em:kt7tial along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a gwyga36g t.+ tn4lvf h5wop/ 4hollowed spherical region of radius 2a. A point charge +Q is placed at 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 ogn4 wvfa43t oyl6.pt 5/gghw+ f the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium isk1v f2dg xwv)*6-wvc2s g+qz d 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 sphere has radius R=3a ankv+w*v-gd s dz fc)v122xwgq6d 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 *ha l-j dg/ev70jk-mksphere 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 potential at pose0lm/jkjh-d7v g*ka-ition r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius1oiy 9lnx,; br 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 shell to be exactly equal,9nxrloi; y1 b?

  05.45: A spherical conducting shell has a net charge +;jbdn50uybq:6 4fjf3 ,cydrv Q placed on it. Which of the following is the correct relationship for the electric potential at the points labeled A, Bbv,;d: j0fn ycdu45rjy q6 3bf, 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 radi:/v rza2ryz -*s3g-p db crt/ous 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 thz r-/ds23po*br -za c:yrt/g ve 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 charxe8au5 qo +f.bsji(8bo , i8poged conducting shells are in free space. The outer shelx j f8uiq b o,ab8p5sioe+.o8(l has inner radius 2a 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 staorlc (*8j 0krdtements presented below that attempt to describe physical phenomena. Which one of the followingrlc(r80jd o*k statements is correct?