05.20: A portable ra7k4r;r)welam u kj)ic ezt +.1wd:hn;dio that is playing is placed inside a screen cage as shown. When inside the cage a: ;1l )wm cwkezue7;jni.r trd)+h 4kthe radio stops playing because

  94.21: Which of the following statements about solid cz(*cuv hh;u 0oonductors in electrostatics are t*hzo0 hu(v c;urue?
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 z: 5m(dzkxv f;crcv;j.8tj o9R has positive charge + Q. Which graph best depicts the electric potential as a function of r, tj9jm fr8txv o:.kcd(c ;;vz5 zhe distance from the center of the sphere?

  96.36: An isolated conducting sphere of 5zvi 5qclll 8a)1 gw(dradius R has positive charge + Q. Which graph beq) 55zla(ivlgl8 dw1 cst depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S0*(.our yptpk1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m anpry. 0ou*pt( kd initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with diff e ;wao.eupl ydvy/v n03/dh0.erent 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 chargeshiua9 )* wr; 0g*5wy+xe yxxjy located at points 4 and 6 on the pog)eyrxya*h 9;+yu ixw *x05jwsitive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowetkg9)*(ot zdh d 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 t9*)z(ht k dgois 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 statubs2yek19sz f6 q o)7nic equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assum1fs o7sznbqe)692u y king 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 hollowrfm7f( fr/r,qed 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 position r =2 a from the center of the7/f,fmr( qr rf spheres is:

  04.50: A solid spherical conducting shell has inner radius u, )kxfo* ej s-.s-vw481vnq jkr ymr0a and outer radius 2a. At the center of the shell ins.0mkr8y )4*-vfv,x u-qj e osw1jkrs 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 conduc2 xws7-rpxve6k .p tm9t.ef* zting shell has a net charge +Q placed on it. Which of the following is the correct relationship for the electric potent6kf9tpe7.z.-pr2m vswt xe*x ial 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 sphericb00-x 6k kujn.bp c8ub:l0 iaaal conductor has charge +Q and radius 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 the labeled points in the diagram? Assume these objects are isola k8n-b6xi0la00kpu.u jb: acbted 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 fl (v*jnf36vxan6z7lyk7f ;d free space. The outer shell has inner radius 2a and outer radius 3a. The ilfyvd 6 nx*a3l76jz7k vffn;(nner 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 b7kxpoai y:46ldv2 3wattempt to describe physical phenomena. Which one of the following statementl2ik4376a bpyxdw o:vs is correct?