05.20: A portable radio that is playing is bzr+nu 4 vcbm (q48+qaplaced inside a screen cage as shown. When inside+b 4qbmu anzrq+(v4c 8 the cage the radio stops playing because

  94.21: Which of the fol ey/.vq ckp3i.lowing statements about solid conductors in electrostatics ar.p 3.e kiyq/cve 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 posik2i d58ffxjm1 tive charge + Q. Which graph best depicts j 521kfidx8 fmthe electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has f5k4,7n mq-hz kv0nvcpositive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the center offn75 h 0vnmk,4z k-vcq the sphere?

  96.21: Two isolated conductsiie / s qc6t9652lnfying spheres (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. 92ls5/ cfq eits6y6niCharge will flow in the wire until:

  17.46 Two copper spheres X and 5rn2lumvb y )/lmlrz/v.-l m( 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 identre5:uqj ylm5p;:zbs27e ;bj jical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the elu:qe 27l bem ;jy5jzbrs p:;5jectrical potential along the axis?

  03.50: A solid unchargwnp4 ,dwy i-y(ed conducting sphere has radius 3a contains a hollowed spherical region of radius 2a. A point charge +Q is plac-wwdy yin4,p(ed 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 of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibriumgus8*kn( p7e i is isolated in deep space with a net excess charge gu87es(pk*in +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 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 contains a h 9s ews-exm 2ojp5jrxb))txq)h :k1v j2j-3lqollowed spherical region of radius a.se3lvtr skwq) : xqm xj9 ejhbjxp-1-o2)2 )j5 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 shell hassejdsr ct3,m0* c4+ gf inner radius a and outer radius 2a. At the cent*+f3drc g, tjs04cme ser 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?

  05.45: A spherical conducting shel cz fx.+n4 w07vrbv6gll has 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 shell, a distance R from point A, and point C is a distance R from point B outside the sphere. As r gw7+ znfbcv.0x rg46lvoes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is sxp9xc(7u e*w, o- mg9pfcbg9surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3R. Which of the fo- wxp gepcobfg*us99 xc(7,9mllowing 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 x rb8pve pzhjb8*.693pbnh-p in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell h6*ehb p9b 3prvjbpzx-p 8n8.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 t - .ccgp+tdidlnbeb4d,,2 o8b hat attempt to describe physical phenomena. Which 4od 8i+ptb c-ld,2b,ce. bgndone of the following statements is correct?