05.20: A portable radio that is playing is placed insid*qp1w0*v ahb de a screen cage as shown. When inside aw 0p 1vh*b*qd the cage the radio stops playing because

  94.21: Which of the following statements about solid conductors in electroohrybu gh c.9i(0 f2+ostatics are + ihbyoh( gcr.9uof02true?
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 R has po5c gy-/xgvuw5sitive charge + Q. Whi/-5u5 ggcvx wych graph best depicts the electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positiv 1qmr5e 2ss-)vlel 6n6dcf.mve charge + Q. Which graph best depicts the electric field as 56sq62mle-re1dvflms v .nc)a function of r, the distance from the center of the sphere?

  96.21: Two isolated cyxw( 2rc+yw;lpc) g+5h7jdszb( tb9m onducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 )r9y +wbd; m+s2( ptwjlbgchxy57 c (zof radius 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 spheres X and Y, with differenq:uu19v7p* 6c7fv54+ j sa yw9l.tj zh cjyydnt 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 identirah vhjpz:2h4g s:v3/cal 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 a2/:hzr4av j:psh3vh gxis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed sphbki ;8sc25a6sfp ca8v erical 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 field at the position r = 4a from the cenpa fc; v2i8cask6sb 58ter of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere ine:9lruf: mnf 7t4k3yi static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at the pos f flruk:y4imn7e 3:t9ition 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 rad3g*bzf :pm-s(uda k6f 5 rkx6yius 3a contains a hollowed spherical region of radius a. A point charge +Q is placed at the u -* 3:xrp656fmzgdakb yf (ks 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 hzv( 5 5w01qnqqx(qsf sas 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 s5x50(nqzs fqw1 v qs(qhell 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. W)u* ksro,avb 90 z+4o)swltcl. v eot9hich 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 distance R lv9,v) tt eo4sa.+ 0)lbw o kzcsuro9*from point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radig 0rxoll 4z:k(us 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, Poinx (r o:04lklgzt 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 free space. Thr2 a/(7 mezpyce outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is known that the electric pot(rz 7epcy2/a mential 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 statements6 4w2m hctq3ql presented below that attempt to describe physical phenomena. Whi4lm ctq62wq 3hch one of the following statements is correct?