05.20: A portable radio that is playing is placed inside a 9:zscg f1(9wbj 5iib e :j9h2p7jq offscreen cage as shown. When inside the cage the radio 9pe b q2j: s(5w9ijhf z7f9og:c if1bjstops playing because

  94.21: Which of the following statements ab wujhbzvpf4:gvzu+ 117g w)x.out solid conductors in electrostaticsw j)wv+g.zpzf vug 41 b:1xh7u 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 conducting sphere of radij)f 5 tufbt.:plte/ k*us R has positive charge + Q. Which graph best depicts the electric potential as a functil f/f:etj5)k *up.tt bon of r, the distance from the center of the sphere?

  96.36: An isolated conducting sph(fe1y97x jy:q l woc(sere of radius R has positive charge + Q. Which graph best depicts the electric field as a fuy7(yq e wlco:x(s1 fj9nction of r, the distance from the center of the sphere?

  96.21: Two isolated conducting spheres (S1 of radius 0.030 m and ini7dm5 1xu+jn mltial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are conn1dmmjnl +7xu5ected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, wiib*iir0jatf(;pz l 616zqpbug+0 v h,th 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 uzfe5io60 z;keo1 3rpcharges located at points 4 and 6 on the positive x axis. Which of the following graphs best represent 136p fooizruzk0ee ;5the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere bhmg09c18*l okaf:p :c2kkn nhas 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 ce0ak2gnkhco 9 p* fm81k cbn:l: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 sphere in static equilibrium is isolatevvv57r ywi *ya;/-ng hi9sff9 d 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 is at a locatio5i/ g9*if h-v w7vnyvysar f9;n r=2a from the center of the sphere at an angle of $60^{\circ}$with respect to the +x-axis.

  02.49: A solid, unchavr(obycvv8 74rged conducting 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 froy7br4 vvcv 8o(m the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outer -84 w4j/frfg7dk l5-zaym vj;r7 dpffradius 2a. At the center of the shell is locfyfg r747vdpf kjl;m-5jz/ d wa-r4f 8ated 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 placed on it. Wht0x jy0 l3fv3kaq9gf ;ich of the following is the correct relationship for the electric potential at the points labeled A, Bjqa003l ffy3vg;kx 9t , 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 the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge/b 7dgbm0r hc: +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 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 di ghb7r:cb/d 0mstances are from the center of the inner sphere.

  15.48: Two concentric charged conductingc9 b7sop;at6*v bplcm d6 w2a0 shells are in free space. The outer shell has inner radius 2a and outm 6b96ldb caw;a07vpt os*2cper 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 statementbce;.n9vx; 94jcoh xul g-c9ks presented below that attempt to describe physical phenomena. Which one of the following statements is co.e x;hnljckvoc-bu x9;cg499 rrect?