05.20: A portable radio that is 4h i- vw4l+p9 odki9roplaying is placed inside a screen cage as shown. When inside the cage the radio o4h+49dr v9l-wii pk o stops playing because

  94.21: Which of the following statements about solid cthf2s*+9oe 9q gez,ho onductors in electrostatics are oeh92* s,o9g+fqht ze 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 + Q. Whi8zagasqm2 cj 9-o)gf) h9kee-ch graph best depicts theq289s-9a)aj cogfe)- k mzgeh electric potential as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting spheowk j619 znldx1 btxzsjp//0 4v9 q5xvre of radius R has positive charge + Q. Which graph bqx4ojwv v 9n z9dpz6 s jx/l5t01b1k/xest depicts the electric field as a function of r, the distance from the center of the sphere?

  96.21: Two isolated co ,1 nk5tl(5r6ltaopsv/ jey/ j4teu:u nducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 nC) are connece:kt/ll5uj, a1j / 6yrve4n opts5(tuted by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with dih q586y;by qz.x- vhjnfferent 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 chargesewye h,)6g rt; located at points 4 and 6 on the positive x axis. Which of the following graphs best represent the electrical6ewte )yg ;hr, potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a con9b2oyo)s6 qoi tains 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 field at the position r = b so o62)ioq9y4a from the center of the spheres as marked in the figure by P?

  11.46: A hollow conducting sphere in static equilibrium md)gw8 . g doxc:-, 1hbdh*ksfu+pz4r is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) at t.gz,kh48msx b gohw f*d-cp+ dd1r:u)he 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 si mb(a+u6)8 rg hcw)+hhw- rtqphere of radius 3a contains a hollowed spherical region of radius a. A point char mwghhi6uw++-q tr )c)ra(b 8hge +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 conda3z sfa)cbmn34 ; fmo-ucting shell has inner radius a and outer radius 2a. At the center of the shell is located a point charge ms -b3focaf )mna 4;3z+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 odrx jla) :yq1u.d3 o25jj .m(h*odk xnn 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 poinjya)l3j5n2:r ( oomu1.dhx jkqd.xd*t B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has cha5m icg; eod) u0f5k+ti h-sue-rge +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 c5 ih+k dm5-ousit)0;gfeu e-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 +9otlf(z /bf3nal( l sin free space. The outer shell has inner radius 2a ao(/zbl9n lftas + l3f(nd outer 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-itths vxd7/ 3 statements presented below that attempt to describe physical phenomena. Which one of s7x it/ vdh-3tthe following statements is correct?