05.20: A portable radio that is playing is placed inside a screen cag cw-x)dysotm:75smu9e as shown. When inside the cage the radio stops playing bmosxy m) du75cs9tw:-ecause

  94.21: Which of the following statements about solid conductors in elwdd2 7g:epu gkf65*mkectrostatics are tr7mf*5 e6udg2dgk: wkp ue?
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 condudxct2gwzpeu 3rg + e if9,(d2/cting sphere of radius R has positive charge + Q. Which graph best depicts the electric potential as a function of r, tg/9(ite2,ur pzcg w32e fd+dxhe distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive6r spon17a7ekp z*xck /7jd a, charge + Q. Which graph best depicts the electric field as a function of r, the distance from the c/a6p,dn1o7e akz 7 p 7*jrskcxenter of the sphere?

  96.21: Two isolated conducting spheres (S1 of rad)xu,:jd ;ycxu9 x q4nqius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 und;xq4,x9y)q jc xu: nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with differenm/ g1h60b1qr0u .*krlxso lbrt 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 aduttegk *-xy d541fy* t points 4 and 6 on the positive x axis. Which of the following graphs best rep* yx41udkt etg5y-df*resent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a conm,:pjl)35:hez5p5ksl c ey0 xc9 s igatains a hollowed spherical region of radius 2a. A point charge +Q is placed at a position a distance a from the common centjzllk p3:h:syc9 )egme5pcas 05i5 ,xer 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 cony3zwkx k8 2zb)ducting sphere in static equilibrium is isolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = x8k ybkw3z )z20 ) 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 conducting sphere of ra; satp8 zvul8edc6+u66df i /pmb4wv, dius 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 poupa v,idsz ;4b m/ dftp686v+ ec6lw8utential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and outery6pdc:,im msvi .lk /dqd *b11 radius 2a. At the center of the shell is located 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 ofp:isdc1d /iv. 6ykbd1 lm,*qm the shell to be exactly equal?

  05.45: A spherical conducting shell y r)ao4wa fai28.svb9 has a net charge +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 a. b8 fva94saw)2ryoi 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 R5xv9 +vvc gfg n5vr1m*. 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 ar+r xnv5 fv15gv9mv*g ce 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 outer shen5kwfp1 **l pa2c qt5rl w**nk1pfr2 cpla 5tq5l has inner radius 2a and 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 stateme3df il -.wre65u8skv4xgjl8 ynts presented below that attempt to describe physical phenomena. Whicyv kw8 5x-fl4egs u6 .3l8irjdh one of the following statements is correct?