05.20: A portable radio that is playing is placey-j tw ,t:yo(zd inside a screen cage as shown. zt:(o- yj ywt, When inside the cage the radio stops playing because

  94.21: Which of the following statements about solid co4,8,abe ).aikh fk3a qq+xsuz;xc c/l nductors in electrostatics are8 ,x/k)l3 +.czixb4hca qfa u,asqek; 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 radiur2w j/.sy7b3 cr hw(ics R has positive charge + Q. Which graph best depicts the electric potential3s.j/ichrw2b 7(ycw r 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 6iw b+zfbm6zqz lv56b9aru61+ Q. Which graph best depicts the electric field as a function of r, the distance from the center of the sphere? b96+w61zb rim5 lbuz6a6z qf v

  96.21: Two isolated conducting spheres (S1 of ra6hc- .-ysl yvgrc22xudius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial charge + 2.0 uhrv.6cgl -y2ycs 2-x nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, with diffs .--on qc7rkferent 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 shou*avlk-pyic: +k)y0 u ws two identical positive charges located at points 4 and 6 on the positive x axis. Which o* a)-:p0+lui kvy uckyf the following graphs best represent the electrical potential along the axis?

  03.50: A solid uncharged conducting spv1h6ipxak6,1o fms e 6here has 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 fo66 6 s,mxiav1pke1hthe electric 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 isolated imerf36tthfs93-* u ojb+7 d len deepr *t+ftm7e3 - 6olfh3ejus d9b 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? 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 c30-28n*redhkb. :vlmus un z,db+dp2az- h ccontains a hollowed spherical region of radius a. A point charg2c ndunc+bdz,bausd.23 v *pkz re8:0-mhl -he +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 spherilp n4zj1.9 cqwcal conducting shell has inner radius a and outer 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 wqc. zljn419pcharge 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 on it. Which o) y:cvcnlloa..qftgt26 .*zdf the following is the correct relatic.a2vnf lz tqlc6g.o t:*. y)donship 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 point B outside the sphere. As r goes to infinity, V = 0.

  07.42: A solid spherical conductor has charge +Qu;/p3 ,hxo)hp3*atxe qdjnq , /+api7 eqt6gp 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 labeledj*t 3i,a ep+p,xpqouxdqtnh h/aep3q7 )6g/ ; 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 charge-pt+bb6oqln+ un 89hcmhyq6 1d conducting shells are in free space. The outer shell has inner radius 2a and outer radius 3a. The in n-6c 81p 6ulb 9+h+oqbmhtyqnner 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 tcibo ct-r6ufxn, 9:j0hat attempt to describe physical phenomena. Which one of the follow9oj0n b: i-trux6fc c,ing statements is correct?