05.20: A portable radif3 k+;u 8 a6usfgkkgcqtlvq74a; 1t,ho that is playing is placed inside a screen cage as shown. When inside the cage the rk1qlggvk6k u ca; q3 t,8u+ 4hs;ftf7aadio stops playing because

  94.21: Which of the following statements about solidpo0tll wfao7 *1s2,bk conductors in electrostatics arepk,blw t0*2 7 fol1sao 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 sphere of radius R has positive charge + d8cspgn:r 9m )hrouxm0c: :rd, s-q(q Q. Which graph best depicts the electric potential as a function of r, the distance from th:m-g: qc, rcr m08spx9)noh(rddus:qe center of the sphere?

  96.36: An isolated conductinrx41j vqc.6no3-dei z g sphere of radius R has positive charge + Q. Which graph zvri6c41xj-. e qdon 3best depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and in(xwh,t tm24 q ay7dtbvl.) 1buitial charge + 6.0 nC and S2 ofxuab.(tqtmt17)2d 4 wy,lbvh 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 g tgs g+9vk+ek.t6:5 bru:fhtX 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 locateewss/,i 4jb. . p pih9fjmf9 yg6md75kd at points 4 and 6 on the positive x 7dsgwmb6,me9hi/4. f95s.p pikjyf j axis. Which of the following graphs best represent the electrical potential along the axis?

  03.50: A solid unchad c:yo3geq,n3n* u.r prged conducting sphere has 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 cecoqrdyne3 n*3u:,p. g nter 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 s/-ja xzuvipi*c2. eg r2+mns *phere in 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 position labeled P shown in the interior of jg*eis+anpc*x.2 /- zviurm2the 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 cond91bhg) h fih i4tf qb(-55zattucting sphere of radius 3a contains a hollowed spherical re 15g h9hhizitbt4a f qb-5(ft)gion 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 the spheres is:

  04.50: A solid spherical conducting shell has ir j7v 8yqixn ,1mp2qy9nner radius a and outer radius 2a. At the center of the shell is located a point charge +Q. What m i9m71qjxqrn , 8pyv2yust 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 cb 6l 6(ilsmc4ep5 6uvh0oa; heharge +Q placed 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 distance R from point B outside t;ephum4v o(66 c6lab leih50 she sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It is surroundedsgvphxd4-6(m3 o car , 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 o36rc -ma(xh4vd g s,pobjects 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 charged conducting shells are in free space. Theo 8p220tfdkd;0 z*(rap mbx be outer shell has inner radius 2a and outer ra( xezftp0mapb ;o 8rk*d0bd 22dius 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 statemenj: u9q*emm uhtjaw803ts presented below that attempt to describe physical phenomen 8hae:3*qw9 mumjj ut0a. Which one of the following statements is correct?