05.20: A portable radio that is playing is placed inside a screen cage oc ehur*94xj1mi 80e4j fpsy0 as shown. When inside the cage the radio s mey i1c9o*8x4pfhuj0es0jr4 tops playing because

  94.21: Which of the following statements about solid conductpqj/o3 hq1 z:zors in electrostatic zzj q1h3po/:qs are 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 positive chljad73t chs i69y.e5yarge + Q. Which graph best depicts the electric potential as a function of r, the distance from the center of the sphere? cdj ae5 3.hly7tis6 9y

  96.36: An isolated conducting sphere of radius R has positive charg c xq-z z4 a3 66a/n+refimc4ybpx0d2ke + Q. Which graph best depicts the electric field as a function of r, the distapizx3cm z 66k d4+4/f20b- yxneacaqrnce from the center of the sphere?

  96.21: Two isolated :p742.6vat pbleqsr* hrf; kxconducting spheres (S1 of radius 0.030 m and initial charge + 6.0 nC and S2 of radius 0.040 m and initial char pvrelk:f427xt6rs .* hbq pa;ge + 2.0 nC) are connected by a conducting wire. Charge will flow in the wire until:

  17.46 Two copper spheres X and Y, wit 5053;1 henlse e5dtcb9ns ,eh pzo(jrh 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 pos/wzlidw9, f522t udt gitive charges located at points 4 and 6 on the positive x axis. Which of the following graphs best ref/2wg92i t dwz lu5,dtpresent the electrical potential along the axis?

  03.50: A solid uncharged conducting sphere has radius 3a co64hvd vb;;ly3vp enm.dl*-v kntains a hollowed spherical region of radius 2a. A point cyv.6dpk;v4 d vle-v hmbnl3*;harge +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 con0k6iwhy ;sv4e ducting sphere in static equilibrium is isolated in deep space with a net excess4sw 6; i0evkhy 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 contains a hollowed,9qodn;pv3n)10skd vhy m.m d spherical region of radius a. A point charge +Q is placed at the common center of the spheres. Taking V = 0 as r → ∞ , the potential at position r =2 a dqndn9 m; )yh1m sk3.0d,vpvofrom the center of the spheres is:

  04.50: A solid spherical conducting shell has inner radius a and o ib;d*jom6+gq/:lj b tf-acx:uter 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 ima:b 6jg/ +qlxo:it*jc ;bd-fnner and outer surfaces of the shell to be exactly equal?

  05.45: A spherical cond(ldj6gf+t e.qz:v z:a ucting shell has a net charge +Q placed on it. Which of the following is the correct relationship for the electric potential at the points labelea(g tlv+ je:z zfq.d6:d 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 sur 8:liy u9+ctfkrounded 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 the8tlk9 yc+i uf: 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 frdj20gdmq l8j+ee space. The outer shell has inner radius 2a and outer radius 3a. The ingqmjdl8 dj 0+2ner 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 attf9bi3p ksw45 eempt to describe physical phf5i9sek 3pwb4 enomena. Which one of the following statements is correct?