05.20: A portable radio that is playing is placed inside a screen cage asu ek, xa+py;z- shown. When uxz py e,-;+akinside the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in j8k9h s ,p;8 sedeot-tm t3ud*electrostatics art9j-*tdsdue k8tm8o he;ps,3e 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 nsg hcivx46 m fo3:0l66y* y4jjyo0vtsphere of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, the *3v 0gfoo 0t s6:yivc6x4mh 6 yj4lynjdistance from the center of the sphere?

  96.36: An isolated conductinp+8kvpzshhkj)/w-vbo 0)g ;fg sphere of radius R has positive charge + Q. Which graph best depicts the electric field as a ;)kwpjbhkf v+ vh0o/8p )z- sgfunction of r, the distance from the center of the sphere?

  96.21: Two isolated conducting sphec.e )4 or9jv z5)eddkm,l9uuxres (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 conducerd5mxu) )ce9ju9o d l.v,z4kting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with differenta rx 6iq8h./a2f jjyj0 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 chargeaoz)ky vqtn e01ry25+s located at points 4 and 6 on the positive x axis. Which2tnvo+kyz)re0 5y1 a q of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged cg )(k8 )qr ydqd76zkflonducting sphere has radius 3a contains a hollowed spherical region o8dd )yl fqkg)7k(qrz6f 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 figure by P?

  11.46: A hollow conducting sphere in static equilibrium is iso9 i+p-bk1q: id3.s;idg uvvdfpg 19kby) ob:xlated 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 r 3dkdb-). bi:+ gx;bs1ifoup 9g1qi: k y9vvdpadius 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 contablzdaipv; 4(, *yw ;lkins a hollowed spherical region of radius a. A point charge +Q is plackwla*v 4( ipd;yl;,zbed 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 spheriwn 6.r;g /rdsical conducting shell has inner radius a and 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 innin rr gs/d.w;6er and outer surfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on( +bqm(*zsam9 fjpqzd 2 - wmv.2l1yxp it. Which of the following is the correct relationship for the electricd1(lf-pwsy(a m9qjq.+v *pmzbz x2m2 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 roq so iui8kkc yf:ys*90g(q ok+;p55 jadius 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 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 cgc(s0up 5ko: ijqf qyoi*8 y 9ksk5;o+enter of the inner sphere.

  15.48: Two concentric charged conducting shells are in free so y1wq7r0rv /qon ,-cepace. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electvo7c,qy10q oe- w/rrnric 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 tha 0kq -wdb)xligdy5 +ry 0u;sd4t attempt to describe phy g0d5 buy-d ldr+;4xqksiw0)ysical phenomena. Which one of the following statements is correct?