05.20: A portable radio that is playing is placmp9 z1un+j, v ra4yk.aed inside a screen cage as shown. When inside the cage the radio uv a zr,+p4yk1 njma.9stops playing because

  94.21: Which of the following statemnzpt u lj8nb4r3wt0-:) x-zgj ents about solid conductors in electrostatics are true? z0tg-xj j b)lwut3n p:r4n 8z-
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 conzcp b gdub,h,w d8:2*bducting sphere of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of the spgz*2u bph8:bwb, ,c ddhere?

  96.36: An isolated conducting sphere of radius R has positive charge + *psp0g9 , 2 cb1yuv yk4pnj*ciQ. Which graph best depicts the electric field as a function of r, the distance from the center of k4u*v*cpcg 0 1p yp2s,njybi9the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and init/jd 2q q.o:vxjial charge + 6.0 nC and S2 of radius 0.040 m and initial charge ./ j2jdo vq:xq+ 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres 076ca3ehyo tc;pyni 2X 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 located at v87losq.v7 zapoints 4 and 6 on the positive x axl77os.za v8vq is. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a conth c ty6,/umk8 .cnzz3hains a hollowed spherical region of radi z8chzthy.k, 63m/unc us 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 of the spheres as marked in the figure by P?

  11.46: A hollow conduioygbb 8*w7y 4cting sphere 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 interior of the figure? The sphere iyob7b 48gw* yhas 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, uncharya , fat828yfci ) o0a)ggj5brged conducting sphere of radius 3a contains a hollowed spherical region of radius a. A point charge)fj fc2tyor)gig5a,88 0bya a +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 conductinaa 9, 0pfgho)cg shell has inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excessoga0 )cfp ah9, 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 conducti,hjhi ;ioag i*+lzb07ng shell 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 cenhgai;,*ijzo 0+ bl ih7ter 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 is surrounah0qj sd qndm-03a (*z .cyud hz447naded by a solid ns*0a hd(z-q .d4aah73nju d4my0qz c 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 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 chaw5f/t;63 4t.xdk.clr me kktbrged conducting shells are in free space. The outer shell has in6 txlkbkd 4tmkf c;t5./.re3wner 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 statements presented below that attempt toor l.obi ih3a)zoy52 - describe physical phenomena. Which one of the followi5 )zyo3 oli2o. b-hairng statements is correct?