05.20: A portable radio that is d5w -j z szg+nt*.d3spplaying is placed inside a screen cage as shown. When inside the cage the radio stops playing p 5d+zd-zj 3nw.stg*sbecause

  94.21: Which of the following statements about solid conductors in electrostajghp7bp;2(dvm):u y ;fq 6jaztics are tr;(6mf ady zj;qvhjg :up)b72pue?
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 clpp do8zfw((/ onducting 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 sphfpd w8ol(/zp( ere?

  96.36: An isolated conducting sphere of radius R has positive chargeoj8:fdh9to .pe u kn7cp1e+ b4a0j8qq + Q. Which graph best depicts the electric field as a p897+o.qt8 j hebc op 0a:n qd1efjk4ufunction of r, the distance from the center of the sphere?

  96.21: Two isolated conducting sphe0*cpi6nll 4qh 83dk 2g8 vbgpsres (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 connectlcg d *qlpsv86pgn0k23b48hi ed by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with difil e-te+4ps4 fferent 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 showsh,u0s : bn-,:-ppyiox n1q*fbeem 0fe two identical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical potential along the axis? b-e0:,efp ye- unfs*bp0oqi:h 1, xmn

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed sph 2lrvya t.l7s6 vc):hherical region of radius 2a. A point charge +Q is placed at a position a distance a from the commotvhchl.7s 2rl va6 ):yn 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 equilibr/. sjp:ar wc4cium is isolated in deep space with a net exp.rs4wjc: a/ ccess 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 center of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, uncharged conductingrdem y;2kusp ;)k nd r16h-wd) 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. h2; ey6w-snkpu)d ;drmkd 1 r) Taking V = 0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inn pf2r7 jv63t 1act3keper radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What must the excess chaj k pf6 t13p3re7v2ctarge 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. Whiccw9t5l+ng dy: h 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 ln gt5:+dyw9cis a distance R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge + fv:)sogl5l(ppn1v( o 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 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 s 51:(pn()vvloofgl pthe 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 cha)+kdik(1ne 4zhmhe2( k 7yjmlrged conducting shells are in free space. The outer shell has inner radius 2a and outerem1y ik+4dnk(h em2k)7zh(j l 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 s,a; gnjjy ga9s 74zzz0tatements presented below that attempt to describe physical phenomena. Which one of the followinz z, aa9s7gyn0j jgz;4g statements is correct?