05.20: A portable radio that is playing is placed ins ;fk )4gz -mhb2 l+dw1tsv2nkside a screen cage as shown. When inside thlkmn dvh ;g 2tk1zf4b+s2)sw- e cage the radio stops playing because

  94.21: Which of the following u2 d4 :fx,x:b dfeo65upmrz k2statements about solid conductors in electrostatics are tb,:p2dofx m6e2:k4 duu5frzxrue?
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.l e(pe97kpy*ca27i-lgcaep. Which graph best depicts the electric potential as a function of r, the distan2ei*p l yc c7(97ap.e -plegkace from the center of the sphere?

  96.36: An isolated conductzgb38le v8v-jmt: /d ying sphere of radius R has positive charge + Q. Which graph best depicts the electri8-/ t:ebvjdl8g3m yzvc 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 initial xvy s2*wnk+;d1bjof8 fxl(7mcharge + 6.0 nC and S2 of radius 0.040 m and initial charge + 8yos; f f7l2bk1 nvjxx(+ dm*w2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres grvluw4iz0 -167jei ke3 jf(mX 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 located at points 4 agm/s 0 mv-a4w 2e.spmznd 6 on the positive x axis. Which of the following graphs best represent the electrical poten sge 4/v0 2p.mm-wmzsatial along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a contains a ho28he9udww e3 k7s;bhb b97ulwllowed spherical region of dw7 73bubb hesl9ekhuw;98w2radius 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 center of the spheres as marked in the figure by P?

  11.46: A hollow condu7ct pms, m4lr:cting sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming Vmp4, s:mrtl7c(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 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 c iy icfpzn;.gb3*bs 2o8(v 1ltonducting 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. Taking2 bsgf l(;n oipyb 1.8tzvc*i3 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 inner radius a (7 5nasyktepr il/.hx,p;qp*and outer radius 2a. At the center of the shell is locateda(sp7 tx ;qe*/5 iph,kl.rnyp 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 vpt5:u j6ww8qs (c+uxbsip8d5 f /b,thas a net charge +Q placed on it. Which of the following is the correct relationship for the electric potential at the points label 8di8 5c/u6,w (u:vbttb fssqx+ppjw5ed 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 is surro8s7yj5m3ial tunded 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 diagrai78aj tm ys3l5m? 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 condu7qv j d+-9xwdncting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The inner shell has radius a. It is kno-jnv7 9qd w+dxwn 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 att3v;vx48-u ntw *l tcrkempt to describe physical phenomena.;3t cvlr-tknx*4 uv8w Which one of the following statements is correct?