05.20: A portable radio that is playing ic wft5mwfo g86 3 :v 0yercq5vin*/k7gs placed inside a screen cage as shown. Whe7q:/5g vcvm805 fw*n cwtife6o3r gy kn inside the cage the radio stops playing because

  94.21: Which of the following statements about solid condwe t sjstn-v60iu2,2 zc9-rquuctors in electrostatics are true? j9rw-qutvt 22us c- 06iezsn,
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 conductinhgir:14yrkz+tgp6 hb1,: k sy+bm 4bvg 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 hk+z 4 b4 +sp1,b1btvryimhg r6:g ky:the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + Qze 64 y30hdx;w.zcfielxul m* u w38q/. Which graph best depicts the electric field as a functionidq umeu.wf*0;c38wx3hy zlx4 /6zle of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radiusbgsycf+)a, ni 5pfpn wh* *y6ukq/48 r 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 condu ,*cyy8puha*ks56nqrgpwf 4in b/f)+ cting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X a8 *ip8n( zcb y*xvp7lrnd 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 locateaa *u 3v4nh2jcd at points 4 and 6 on the jhv n3c *2aa4upositive x axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere hd6 wmee3 -xlh-q.w ,4j4tj mjjas 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.j jhem, -qm3 4t-x j6dwe4wjl 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 xmxq+x;kf 15eu f4vj2is 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 is1u4xxk em+ qff52;jvx 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 c+ 2sswb kondz6;24wo eonducting 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 position r =2 a from the center of ok +sbwn2d4sz;e 2o6w the spheres is:

  04.50: A solid spherical conducting shell hz 86xie87kp s+h)xv x -kztm0sas 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 inner and outer su p68s)x+xhikzk8mx- vts z7 e0rfaces of the shell to be exactly equal?

  05.45: A spherical conducting shell has a net charge +Q placed on it. Which o -h/jhowocm65 f the following is the correct relationship for the electric potential at the points labeled A, B, and C? Point A owh/ c6jo5 -hmis 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 clcbnjgj(d s41 2;c miw.1vo6 eharge +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 the inner sphere, Point B is iwoc ;n 1bj.(gdmelj 2s614cv 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 charge)q5cno z0l1cfpva + n*9ho9pv )khps (d 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 v1)happn)vo+l9kscpz95*h0 o q (nfc 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 bes8f i0zu7i *xelow that attempt to describe physical phenomena. Whis78fux *i0 ezich one of the following statements is correct?