05.20: A portable radio that is playing is placed inside a screen cage as w6u yaqcz)x2 (2 g1ro,i 7xzvi shown. When inside the cage the radio stops play1yvgiz7 6,)uwxx2 icz (o r2qaing because

  94.21: Which of the following statements about solid c-s(d1 gpke)w w)f5cf)pj i( mdonductors in electrostatics are dd )( )w1(p- skwef5)fp mjcigtrue?
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 positivv;c 6yq;s qyg-e charge + Q. Which graph bes qy y;cs6gv-;qt depicts the 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 positive charge lw5s ;swgk*g; + Q. Which graph best depicts th;sgsg5lw;k*w e electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and initiamm7g (t+zc s1o1kl- nsl charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connected by a co 17 1s+ock-lt gnmzms(nducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X anv eb-zvf )9r.u x3cz-1k1is lyd 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 pol2*yp:rqk x( 298bjrh5rtz-)xcnaqd sitive charges located at points 4 and 6 on thexlqr c2q)pd -(8kr: 9r za*hjnxt 5b2y positive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharg,:vxts:c tre9ed 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 common center of the spheres. What is the magnitude of the electric field at the position r = 4a fromcvxr se:,:t9t the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sgq8 qrdh093* i y+ doxqon**me 5hw30qut.jcaphere 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 has radius R=3a and the point of interest is at a location r=2a from the centq g m*0wqqu3nidy8a+9roj. h *3x ceo0d*5tqh er of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged +mnay4nruu.+ xe1x:i*+ko ;r5kojk t conducting sphere 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 .1krin *4j+no+a+kxtuymo: xuk5;er position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and 9u,v fti was0-svir:2vjbw: . 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 v9vi-ju.bi wvwr: s,st:0 fa 2shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q pltgmsme :.5v14 vp8z(ejwry2 faced on it. Which of the following is the coyft e zgm8vs.j (154: 2vmpwrerrect 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 radiu3w63tmg b7gz62499oyg hnlir vfs3t us R. It is surrounded by a solid spherical shell with charge − Q, zrub7yhs4 33i9o2g f63w6g nvtlt9 gminner 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 charged condu-elshfg ty2 dkl2;p5hu1:a5d cting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner 1hlkgh5sflpd 52 ;d:2euy at -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 sevec)m3 d,0gph;;xx.a tk n/qydnral statements presented below that attempt to describe physical phenomena. Which one of the following statemeph;n;. dmqg/)cadnk x ,30 ytxnts is correct?