05.20: A portable radio that i(hnu+euk7(nog1b z +ns playing is placed inside a screen cage as shown. When inside the cage the radio stops playing because kung+(z71(h n+bnoue

  94.21: Which of the followin7dok 0fc8*ap6abn a2 jiag,2kg statements about solid conductors in electrostatics are tr2jn,c *0 kaapao gibd6kf8a72 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 condswq(.5lc-4 uq5sp jpm ucting sphere of radius R has positive charge + Q. Which graph best depicts the electric pote 4pjsqw- pscl5.uq m5(ntial as a function of r, the distance from the center of the sphere?

  96.36: An isolated conducting sphere of radius R has positive charge + .t owc/g2 .idjpr*trmytx031Q. Which graph best depicts the electric field as a function of r, thet .1ocx mw tgj/3pr yd*t.2ri0 distance from the center of the sphere?

  96.21: Two isolated cxt2 csdx na;njh.4vuk37n z s1j; xj*9onducting 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 connected by a conducting wire. Charge will flow in tha23.9 nxtj;sc * xh;dx4u7vnksz 1jnje wire until:

  17.46 Two copper spheres X and Y, b y/1hf*q a:sa y1 csrs*dzg8)0lta m7zy9 iq4with 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 pq5kywn+mm6-t1z1 e*mq x c- wvositive charges located at points 4 and 6 on the positive x axis. Which of the6ne1mmvtz1+q *y5x-w qkw c-m following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere haaw32hi7pks4xtlta9h3 k y76h s 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 center of the spheres. What is the magnitude of the electrht2973xhat6 alh 47 ispykwk3ic 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 is dust( qi;t92d 4,lrkeolated in deep space with a net excess charge +Q on it. What is the electric potential (assuming V(r → ∞) = 0 ) atidk,q4 ;92 utl(sdtr e 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 radius 3a contains ayzs2 ::a5f xjb hollowed spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞bs:af:z5y jx2 , the potential at position r =2 a from the center of the spheres is:

  04.50: A solid spherical cond;ja6, ou k bw4fxt7bz8ucting shell has inner radius a and outer radius 2a. At the center of the shell is 6t xf8jukbb, 4o az7;wlocated 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 charg) d4xqd j bl2bff0t: fjji7/9ke +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, poink2t7jb9 /d4 fx: ff0 ljibq)jdt 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 radz* 5o j:g8uu+zuwoup9 ius 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 9p *wuu jou+zo 85gz:u− δwhere δ is an infinitesimal amount and all distances are from the center of the inner sphere.

  15.48: Two concentrich4bcmdm2k14,b)x g9 lty zqi5 charged conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a.bhcq i92)4t4k, lb1zx5y gdmm 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 statements presented below that attempt to describe phq.:.z)w gq hg+pia45p-nkstqysical phenomena. Which one of the following statements is corrqg) : i5pnst kwpa4gq+zh .q.-ect?