05.20: A portable radio that is playing is placed i-3u/zdrym p-, nlraj7nside a screen cage as shown. When inside thdj-r3alnpym , u-7 /rze cage the radio stops playing because

  94.21: Which of the following st0(kh; n1gdkzg1p pv p. zw:,gtatements about solid conductors in electrostatics dz1 :kgv. wh pp0z(k;g1t ng,pare 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 pos9z( zz9iu rmtu3sw6z7itive charge + Q. Which graph best depicts the electric potential as sz 9r3imwztu (76uzz9 a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positi; tg2m 1s9gee4e 8e-yjcb:ip fve charge + Q. Which graph best depicts the electric field as a function of r, the distance from thee248:9 ebc - ;tjm pgfeigsey1 center of the sphere?

  96.21: Two isolated conductial ,oh7z,sky /ng spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and kaol hsz7,/y ,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 differei yobc 6p+1h8cnt 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 sho gyf-e(zlx*y4r.jgv7ws two identical positive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best representglxf(y* r7yvj . ezg4- the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a hollowed spwtxp2 qt*f q-hg9/e:bherical 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 chqt*qp9we/-t x:b g f2enter of the spheres as marked in the figure by P?

  11.46: A hollow conducting s zzj2-xky 2oq3phere 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 the figure?2oky- 2qjx3 zz 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 radius 3a col*;1dupid l re-+8vajntains a hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = i- u ed;1r8a lpjdv*+l0 as r → ∞ , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting) q+uh gewbu9/ shell has inner radius a and outer radius 2a. At the center of the shell is locaw)/+hquu 9 bgeted 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 hsozh (u+uera fuke*,-i,;ng ;as a net charge +Q placed on it. Which of the following is the correct relationship for the elea + re*; f ng;oskuuzh-e,ui,(ctric 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 the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Q and radius R. It i8 k9xwn w:fn9;ce k niv6/lng9s surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3R. Which of the following statem8n nx9k i: k;9lwgvnenfw/6c9ents 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 distances are from the center of the inner sphere.

  15.48: Two concentric charged conducting shells are in free space. The ou wn;rrrmy,wg . 8u,t:yter shell has inner radius 2a and outer radius 3a. m nwr8: t .y,y;,urrwgThe 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 statements presented below that attempt too9-ssix2 a1kv describe physical phenomena. Which one of the followingxs9-21s vo iak statements is correct?