05.20: A portable radio that ipreu 5*64bmi rs playing is placed inside a screen cage as shown. When inside the cage the radio stops p 6*br45r uimeplaying because

  94.21: Which of the following statements about soe4g7m adx;93xeer9u( rbu1wxlid conductors in electrostatic4beuu 9;d9exrw7 ga m3re1x(x s are 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 c+o1ruf z6ki bdgc( :yj,+wq i6onducting sphere of radius R has positive charge + Q. Which graph best depicts the c ( q gw6+i dy61+,zou:jifbrkelectric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphe 3udm reu/- l we*o.sep1f4b)qre of radius R has positive charge + Q. Which graph best depicts the electric field as a function of r, the distance ew mud.1usq* fo e3)b4l p/er-from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radiusr0(( 5ebev:c +cpvl hlf5qaq8 0.030 m and initial charge + 6.0 nC and S2 of racqvaqbvcr+(p : 05(l ehel8f5dius 0.040 m and initial charge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spherec1yp *xklpu0 kk(ps wi(s)4 w(s X and 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 positive charges lo t1( c5g-giaotcated at points 4 and 6 on the positive x axis. Which og(t5i c-1atgof the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 31laxgths.,)jcgtz-xi w -4 w; a contains a hollowed spherical region of radius 2a. A point charge +Q is )zlhci-wxxts-, g4aw .j;g t1placed 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 conductailbd5k)a6l 5ing sphere in static equilibrium is isolated in dad 6 5iball)k5eep 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 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 conta1 nzs;7 y j1vzax)n9dcins a hollowed spherical region of radius a. A point 9 7zc n)1yjz;1xa svndcharge +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 conducting shell has inner radius a and outetr m0dp7enx(dk7a8y w127 ypir radius 2a. At the centerd7ep ktnr2pd1 7( myx7 aw08yi 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 shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q pn- bz by(5,zqf-9hd7olq sn/olaced on it. 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 distab7sby/n-qd(,h z 9fqo lno-z5nce R from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge + h9.t:okn6gx1b /dij rQ and radius R. It is surrounded by a solid spherical shell with chargeih krxtj .odb 9:6g/1n − 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 center of the inner sphere.

  15.48: Two concentric ccuxhf9wmcm4 w.*./ 7 jyvr(xuharged conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric potential aumwv w/ .*4x y x9mc.(hurjf7ct $r=3a$ 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-wtyknrcq: (/ ddc77 i attempt to describe physical phenomena. Which ony d : -c7iwrtkqd7c(/ne of the following statements is correct?