05.20: A portable radio that is playin m;d*gnm13gra)cua1f w2 f*ii g is placed inside a screen cage as shown. When inside the cage dm*frig)m1c;3iafwu 1 nga *2 the radio stops playing because

  94.21: Which of the following statements about solid conductors i11xhsilv.(vg n electrostatics ares i .vvx(hg1l1 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 conducg1s 8s:gl fts. 22icsqting 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 2gsi 8q1sfgt: 2sls.csphere?

  96.36: An isolated conducting sphere of re(0 x8gs)c4q2cd 5hca jf/gzbadius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance from the cen/(ecc)g 5z4x2gjs0 8 aqbchfdter of the sphere?

  96.21: Two isolated conducting spheres (Sb16,ksy -vbwg ac6j:v9mav+(hb ub 2h1 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 conductiyhhgb1 uwba,a 266-vsj m+9vbk:vb c(ng wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y,pd+9z x-szsy ngmh1a.fp)1 uern8+a / 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 co*p 3)dgogt r.harges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical.o)g rd3*gp ot potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contait *pb0q hjy )hlqks3on:26 pr.ns a hollowed 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 of the spheres as marked in the fijtqhq3ppr o.:hs*y kl602b)ngure by P?

  11.46: A hollow conducting sphere in static equilibrium is isolate1ga(+f29 tuy9zq 3nj7z 7bzvwzwd i3 ud 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 and th+v wyizuqaz wf3b71(jnz ud2tz93 97g e 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 spheln:qh t9d9ol6 re of radius 3a contains a hollowed spherical region of radius a. A poidllq6t no: 99hnt 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 conducti1ohk rw ;a(jt; ) sp7agy2bcx1ng shell has inner radius a and outer radius 2a. At the center of the shell is located a t;c21j;ypxgr 1(k )soaa7 bwh 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 shell has a net charge +Q placed on it.p, lc2er3xz9ade 0c 2z 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 goes to infinipca 2c9x0,23el ezd zrty, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is sugdl3v 8hr 6ss 1m*xn3drrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer rads13n *vx lm hg6dd8rs3ius 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 sp nx*g2 h)qgebzzn)0d rl/a7p +ace. The outer shell has innera/ z)eznnr)l*x 2p70g h+gq db 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 gfh ,2,0e71oikgnfrv below that attempt to describe physical phenomena. Which one okgfr,g ivo ne7f ,1h20f the following statements is correct?